Quizbank/University Physics Semester 2/T4

University Physics Semester 2/T4 ID153341821922

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Exams:  A0  A1  A2   B0  B1  B2   C0  C1  C2   D0  D1  D2   E0  E1  E2   F0  F1  F2   G0  G1  G2   H0  H1  H2   I0  I1  I2   J0  J1  J2   K0  K1  K2   L0  L1  L2   M0  M1  M2   N0  N1  N2   O0  O1  O2   P0  P1  P2   Q0  Q1  Q2   R0  R1  R2   S0  S1  S2   T0  T1  T2   U0  U1  U2   V0  V1  V2   W0  W1  W2   X0  X1  X2   Y0  Y1  Y2   Z0  Z1  Z2

Answers:  A0  A1  A2   B0  B1  B2   C0  C1  C2   D0  D1  D2   E0  E1  E2   F0  F1  F2   G0  G1  G2   H0  H1  H2   I0  I1  I2   J0  J1  J2   K0  K1  K2   L0  L1  L2   M0  M1  M2   N0  N1  N2   O0  O1  O2   P0  P1  P2   Q0  Q1  Q2   R0  R1  R2   S0  S1  S2   T0  T1  T2   U0  U1  U2   V0  V1  V2   W0  W1  W2   X0  X1  X2   Y0  Y1  Y2   Z0  Z1  Z2

78 Tests = 3 versions x 26 variations: Each of the 26 variations (A, B, ...) represents a different random selection of questions taken from the |study guide.The 3 versions (0,1,..) all have the same questions but in different order and with different numerical inputs. Unless all students take  version "0" it is best to reserve it for the instructor because the questions are grouped according to the order in which they appear on the study guide.

Links:  Quizbank/Instructions   |Study guide    file:QB-University Physics Semester 2-T4.pdf

Contact me at User talk:Guy vandegrift if you need any help.

T4 A0
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 2.61 &Omega; at a temperature of 92&deg;C and that the temperature coefficient of expansion is 4.260E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 422 &deg;C?


 * a) 6.279E+00 &Omega;
 * b) 6.593E+00 &Omega;
 * c) 6.923E+00 &Omega;
 * d) 7.269E+00 &Omega;
 * e) 7.632E+00 &Omega;

2) What is the average current involved when a truck battery sets in motion 728 C of charge in 3.94 s while starting an engine?


 * a) 1.848E+02 A
 * b) 2.032E+02 A
 * c) 2.236E+02 A
 * d) 2.459E+02 A
 * e) 2.705E+02 A

3) Two sources of emf &epsilon;1=13.6 V, and  &epsilon;2=6.53 V are oriented as shownin the circuit. The resistances are R1=2.89 k&Omega; and  R2=2.12 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.11 mA and I4=0.311 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 7.264E-01 mA
 * b) 7.990E-01 mA
 * c) 8.789E-01 mA
 * d) 9.668E-01 mA
 * e) 1.063E+00 mA

4) A given battery has a 11 V emf and an internal resistance of 0.0998 &Omega;. If it is connected to a 0.417 &Omega; resistor what is the power dissipated by that load?


 * a) 1.419E+02 W
 * b) 1.561E+02 W
 * c) 1.717E+02 W
 * d) 1.889E+02 W
 * e) 2.078E+02 W

5) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.7 x 10-4m/s
 * b) 3.27 x 10-4m/s
 * c) 3.96 x 10-4m/s
 * d) 4.79 x 10-4m/s
 * e) 5.81 x 10-4m/s

6) A power supply delivers 138 watts of power to a 206 ohm resistor.  What was the applied voltage?


 * a) 1.39 x 102 volts
 * b) 1.69 x 102 volts
 * c) 2.04 x 102 volts
 * d) 2.47 x 102 volts
 * e) 3 x 102 volts

7) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * a) None of these are true
 * b) 25 Joules
 * c) 3 Joules
 * d) 5 Joules

8) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * a) None of these are true.
 * b) It is not possible to connect that Number of Resistors in parallel.
 * c) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * d) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity

9) An ideal 8.8 V voltage source is connected to two resistors in parallel.  One is 0.8$$k\Omega$$, and the other is 2.9 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 1.56 mA.
 * b) 1.8 mA.
 * c) 2.07 mA.
 * d) 2.38 mA.
 * e) 2.74 mA.

10) A battery has an emf of 5.3 volts, and an internal resistance of 428 $$k\Omega$$. It is connected to a 2.3 $$M\Omega$$ resistor.  What power is developed in the 2.3  $$M\Omega$$ resistor?


 * a) 4.96 $$\mu$$W.
 * b) 5.71 $$\mu$$W.
 * c) 6.56 $$\mu$$W.
 * d) 7.55 $$\mu$$W.
 * e) 8.68 $$\mu$$W.

T4 A1
1) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * a) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * b) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity
 * c) It is not possible to connect that Number of Resistors in parallel.
 * d) None of these are true.

2) A given battery has a 13 V emf and an internal resistance of 0.159 &Omega;. If it is connected to a 0.617 &Omega; resistor what is the power dissipated by that load?


 * a) 1.301E+02 W
 * b) 1.431E+02 W
 * c) 1.574E+02 W
 * d) 1.732E+02 W
 * e) 1.905E+02 W

3) An ideal 5.6 V voltage source is connected to two resistors in parallel.  One is 2.3$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.56 mA.
 * b) 0.64 mA.
 * c) 0.74 mA.
 * d) 0.85 mA.
 * e) 0.98 mA.

4) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * a) 25 Joules
 * b) 3 Joules
 * c) 5 Joules
 * d) None of these are true

5) Imagine a substance could be made into a very hot filament. Suppose the resitance is 4.48 &Omega; at a temperature of 56&deg;C and that the temperature coefficient of expansion is 4.550E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 449 &deg;C?


 * a) 1.028E+01 &Omega;
 * b) 1.079E+01 &Omega;
 * c) 1.133E+01 &Omega;
 * d) 1.190E+01 &Omega;
 * e) 1.249E+01 &Omega;

6) Two sources of emf &epsilon;1=20.6 V, and  &epsilon;2=9.53 V are oriented as shownin the circuit. The resistances are R1=5.46 k&Omega; and  R2=2.55 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.5 mA and I4=0.415 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.085E+00 mA
 * b) 1.194E+00 mA
 * c) 1.313E+00 mA
 * d) 1.444E+00 mA
 * e) 1.589E+00 mA

7) A power supply delivers 138 watts of power to a 206 ohm resistor.  What was the applied voltage?


 * a) 1.39 x 102 volts
 * b) 1.69 x 102 volts
 * c) 2.04 x 102 volts
 * d) 2.47 x 102 volts
 * e) 3 x 102 volts

8) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 6.77 x 10-5m/s
 * b) 8.2 x 10-5m/s
 * c) 9.93 x 10-5m/s
 * d) 1.2 x 10-4m/s
 * e) 1.46 x 10-4m/s

9) A battery has an emf of 7 volts, and an internal resistance of 357 $$k\Omega$$. It is connected to a 2.9 $$M\Omega$$ resistor.  What power is developed in the 2.9  $$M\Omega$$ resistor?


 * a) 13.4 $$\mu$$W.
 * b) 15.4 $$\mu$$W.
 * c) 17.72 $$\mu$$W.
 * d) 20.37 $$\mu$$W.
 * e) 23.43 $$\mu$$W.

10) What is the average current involved when a truck battery sets in motion 669 C of charge in 4.3 s while starting an engine?


 * a) 1.063E+02 A
 * b) 1.169E+02 A
 * c) 1.286E+02 A
 * d) 1.414E+02 A
 * e) 1.556E+02 A

T4 A2
1) Two sources of emf &epsilon;1=29.5 V, and  &epsilon;2=11.0 V are oriented as shownin the circuit. The resistances are R1=2.45 k&Omega; and  R2=1.96 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.03 mA and I4=0.783 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 2.247E+00 mA
 * b) 2.472E+00 mA
 * c) 2.719E+00 mA
 * d) 2.991E+00 mA
 * e) 3.290E+00 mA

2) Imagine a substance could be made into a very hot filament. Suppose the resitance is 6.06 &Omega; at a temperature of 80&deg;C and that the temperature coefficient of expansion is 4.290E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 330 &deg;C?


 * a) 1.196E+01 &Omega;
 * b) 1.256E+01 &Omega;
 * c) 1.319E+01 &Omega;
 * d) 1.385E+01 &Omega;
 * e) 1.454E+01 &Omega;

3) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.24 x 10-5m/s
 * b) 2.72 x 10-5m/s
 * c) 3.29 x 10-5m/s
 * d) 3.99 x 10-5m/s
 * e) 4.83 x 10-5m/s

4) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * a) 8.42 x 101 volts
 * b) 1.02 x 102 volts
 * c) 1.24 x 102 volts
 * d) 1.5 x 102 volts
 * e) 1.81 x 102 volts

5) A given battery has a 12 V emf and an internal resistance of 0.0984 &Omega;. If it is connected to a 0.485 &Omega; resistor what is the power dissipated by that load?


 * a) 2.052E+02 W
 * b) 2.257E+02 W
 * c) 2.483E+02 W
 * d) 2.731E+02 W
 * e) 3.004E+02 W

6) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * a) 3 Joules
 * b) 5 Joules
 * c) None of these are true
 * d) 25 Joules

7) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * a) 7.09 $$\mu$$W.
 * b) 8.16 $$\mu$$W.
 * c) 9.38 $$\mu$$W.
 * d) 10.79 $$\mu$$W.
 * e) 12.41 $$\mu$$W.

8) An ideal 9.2 V voltage source is connected to two resistors in parallel.  One is 1.1$$k\Omega$$, and the other is 2.4 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 2.29 mA.
 * b) 2.63 mA.
 * c) 3.02 mA.
 * d) 3.48 mA.
 * e) 4 mA.

9) What is the average current involved when a truck battery sets in motion 682 C of charge in 5.29 s while starting an engine?


 * a) 1.065E+02 A
 * b) 1.172E+02 A
 * c) 1.289E+02 A
 * d) 1.418E+02 A
 * e) 1.560E+02 A

10) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * a) None of these are true.
 * b) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity
 * c) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * d) It is not possible to connect that Number of Resistors in parallel.

T4 B0
1) A device requires consumes 156 W of power and requires 5.42 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 7.742E+05 A/m2
 * b) 8.516E+05 A/m2
 * c) 9.367E+05 A/m2
 * d) 1.030E+06 A/m2
 * e) 1.133E+06 A/m2

2) What is consumer cost to operate one 102&minus;W incandescent bulb for 5 hours per day for 1 year (365 days) if the cost of electricity is $0.149 per kilowatt-hour?


 * a) $2.292E+01
 * b) $2.521E+01
 * c) $2.774E+01
 * d) $3.051E+01
 * e) $3.356E+01

3) Two sources of emf &epsilon;1=18.6 V, and  &epsilon;2=5.63 V are oriented as shownin the circuit. The resistances are R1=3.9 k&Omega; and  R2=1.1 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.41 mA and I4=0.614 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * a) 4.342E+00 V
 * b) 4.776E+00 V
 * c) 5.254E+00 V
 * d) 5.779E+00 V
 * e) 6.357E+00 V

4) Two sources of emf &epsilon;1=52.7 V, and  &epsilon;2=17.5 V are oriented as shownin the circuit. The resistances are R1=5.86 k&Omega; and  R2=2.08 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.48 mA and I4=0.988 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 2.064E+01 V
 * b) 2.270E+01 V
 * c) 2.497E+01 V
 * d) 2.747E+01 V
 * e) 3.021E+01 V

5) A power supply delivers 187 watts of power to a 287 ohm resistor.  What was the applied voltage?


 * a) 2.32 x 102 volts
 * b) 2.81 x 102 volts
 * c) 3.4 x 102 volts
 * d) 4.12 x 102 volts
 * e) 4.99 x 102 volts

6) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * a) 7.74 x 102 &Omega;
 * b) 9.38 x 102 &Omega;
 * c) 1.14 x 103 &Omega;
 * d) 1.38 x 103 &Omega;
 * e) 1.67 x 103 &Omega;

7) 3 amps flow through a 1 Ohm resistor. What is the voltage?
 * a) $$1V$$
 * b) None these are correct.
 * c) $$3V$$
 * d) $$\frac{1}{3}V$$

8) What is the current through R1, R2, R3, and R4 in the figure shown?
 * a) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * b) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * c) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * d) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..

9) An ideal 6 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 25$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 70.6 A.
 * b) 81.2 A.
 * c) 93.4 A.
 * d) 107.4 A.
 * e) 123.5 A.

10) Two 7.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.8 ohm resistor.  What is the net resistance?


 * a) 5.7 ohms.
 * b) 6.5 ohms.
 * c) 7.5 ohms.
 * d) 8.6 ohms.
 * e) 9.9 ohms.

T4 B1
1) Two sources of emf &epsilon;1=46.1 V, and  &epsilon;2=16.2 V are oriented as shownin the circuit. The resistances are R1=5.17 k&Omega; and  R2=2.06 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.97 mA and I4=1.07 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * a) 1.309E+01 V
 * b) 1.440E+01 V
 * c) 1.584E+01 V
 * d) 1.742E+01 V
 * e) 1.917E+01 V

2) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * a) 8.42 x 101 volts
 * b) 1.02 x 102 volts
 * c) 1.24 x 102 volts
 * d) 1.5 x 102 volts
 * e) 1.81 x 102 volts

3) 3 amps flow through a 1 Ohm resistor. What is the voltage?
 * a) $$\frac{1}{3}V$$
 * b) None these are correct.
 * c) $$1V$$
 * d) $$3V$$

4) A device requires consumes 168 W of power and requires 11.0 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 1.901E+06 A/m2
 * b) 2.091E+06 A/m2
 * c) 2.300E+06 A/m2
 * d) 2.530E+06 A/m2
 * e) 2.783E+06 A/m2

5) Two 7.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.8 ohm resistor.  What is the net resistance?


 * a) 5.7 ohms.
 * b) 6.5 ohms.
 * c) 7.5 ohms.
 * d) 8.6 ohms.
 * e) 9.9 ohms.

6) A 196 Watt DC motor draws 0.35 amps of current. What is effective resistance?


 * a) 1.6 x 103 &Omega;
 * b) 1.94 x 103 &Omega;
 * c) 2.35 x 103 &Omega;
 * d) 2.85 x 103 &Omega;
 * e) 3.45 x 103 &Omega;

7) What is the current through R1, R2, R3, and R4 in the figure shown?
 * a) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * b) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..
 * c) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * d) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.

8) What is consumer cost to operate one 105&minus;W incandescent bulb for 11 hours per day for 1 year (365 days) if the cost of electricity is $0.131 per kilowatt-hour?


 * a) $5.021E+01
 * b) $5.523E+01
 * c) $6.075E+01
 * d) $6.682E+01
 * e) $7.351E+01

9) Two sources of emf &epsilon;1=52.7 V, and  &epsilon;2=17.5 V are oriented as shownin the circuit. The resistances are R1=5.86 k&Omega; and  R2=2.08 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.48 mA and I4=0.988 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 2.064E+01 V
 * b) 2.270E+01 V
 * c) 2.497E+01 V
 * d) 2.747E+01 V
 * e) 3.021E+01 V

10) An ideal 6 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 25$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 70.6 A.
 * b) 81.2 A.
 * c) 93.4 A.
 * d) 107.4 A.
 * e) 123.5 A.

T4 B2
1) What is the current through R1, R2, R3, and R4 in the figure shown?
 * a) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..
 * b) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * c) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * d) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.

2) What is consumer cost to operate one 77&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.124 per kilowatt-hour?


 * a) $3.142E+01
 * b) $3.456E+01
 * c) $3.802E+01
 * d) $4.182E+01
 * e) $4.600E+01

3) A power supply delivers 101 watts of power to a 219 ohm resistor.  What was the applied voltage?


 * a) 1.49 x 102 volts
 * b) 1.8 x 102 volts
 * c) 2.18 x 102 volts
 * d) 2.64 x 102 volts
 * e) 3.2 x 102 volts

4) 3 amps flow through a 1 Ohm resistor. What is the voltage?
 * a) $$3V$$
 * b) $$\frac{1}{3}V$$
 * c) $$1V$$
 * d) None these are correct.

5) An ideal 7.5 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 19$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 54.3 A.
 * b) 62.4 A.
 * c) 71.8 A.
 * d) 82.6 A.
 * e) 94.9 A.

6) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * a) 6.5 ohms.
 * b) 7.5 ohms.
 * c) 8.6 ohms.
 * d) 9.9 ohms.
 * e) 11.4 ohms.

7) A 195 Watt DC motor draws 0.49 amps of current. What is effective resistance?


 * a) 8.12 x 102 &Omega;
 * b) 9.84 x 102 &Omega;
 * c) 1.19 x 103 &Omega;
 * d) 1.44 x 103 &Omega;
 * e) 1.75 x 103 &Omega;

8) Two sources of emf &epsilon;1=38.8 V, and  &epsilon;2=14.9 V are oriented as shownin the circuit. The resistances are R1=5.83 k&Omega; and  R2=1.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.57 mA and I4=1.19 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 1.013E+01 V
 * b) 1.115E+01 V
 * c) 1.226E+01 V
 * d) 1.349E+01 V
 * e) 1.484E+01 V

9) Two sources of emf &epsilon;1=39.4 V, and  &epsilon;2=12.2 V are oriented as shownin the circuit. The resistances are R1=3.84 k&Omega; and  R2=2.01 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.71 mA and I4=0.669 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * a) 8.825E+00 V
 * b) 9.708E+00 V
 * c) 1.068E+01 V
 * d) 1.175E+01 V
 * e) 1.292E+01 V

10) A device requires consumes 126 W of power and requires 1.11 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 2.110E+05 A/m2
 * b) 2.321E+05 A/m2
 * c) 2.553E+05 A/m2
 * d) 2.809E+05 A/m2
 * e) 3.090E+05 A/m2

T4 C0
1) A make-believe metal has a density of 6.650E+03 kg/m3 and an atomic mass of 67.5 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 4.456E+28 e&minus;/m3
 * b) 4.901E+28 e&minus;/m3
 * c) 5.392E+28 e&minus;/m3
 * d) 5.931E+28 e&minus;/m3
 * e) 6.524E+28 e&minus;/m3

2) Calculate the resistance of a 12-gauge copper wire that is 11 m long and carries a current of 94 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.813E-02 &Omega;
 * b) 4.195E-02 &Omega;
 * c) 4.614E-02 &Omega;
 * d) 5.076E-02 &Omega;
 * e) 5.583E-02 &Omega;

3) Two sources of emf &epsilon;1=30.5 V, and  &epsilon;2=12.0 V are oriented as shownin the circuit. The resistances are R1=3.79 k&Omega; and  R2=1.86 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.07 mA and I4=0.73 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 2.281E+00 mA
 * b) 2.509E+00 mA
 * c) 2.760E+00 mA
 * d) 3.036E+00 mA
 * e) 3.340E+00 mA

4) In the circuit shown V=15.2 V, R1=1.6 &Omega;, R2=7.89 &Omega;, and R3=15.3 &Omega;. What is the power dissipated by R2?


 * a) 1.713E+01 W
 * b) 1.885E+01 W
 * c) 2.073E+01 W
 * d) 2.280E+01 W
 * e) 2.508E+01 W

5) A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?


 * a) 4.06 x 10-2 W
 * b) 4.92 x 10-2 W
 * c) 5.96 x 10-2 W
 * d) 7.22 x 10-2 W
 * e) 8.75 x 10-2 W

6) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.24 x 10-5m/s
 * b) 2.72 x 10-5m/s
 * c) 3.29 x 10-5m/s
 * d) 3.99 x 10-5m/s
 * e) 4.83 x 10-5m/s

7) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * a) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * b) None of these are true.
 * c) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity
 * d) It is not possible to connect that Number of Resistors in parallel.

8) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * a) I = 5A &  P = 25W.
 * b) I = 5A &  P = 9W
 * c) I = 5A &  P = 5W.
 * d) I = 5A &  P = 3W.

9) An ideal 7.9 V voltage source is connected to two resistors in parallel.  One is 2.4$$k\Omega$$, and the other is 5.2 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.68 mA.
 * b) 0.79 mA.
 * c) 0.9 mA.
 * d) 1.04 mA.
 * e) 1.2 mA.

10) A battery has an emf of 5.3 volts, and an internal resistance of 428 $$k\Omega$$. It is connected to a 2.3 $$M\Omega$$ resistor.  What power is developed in the 2.3  $$M\Omega$$ resistor?


 * a) 4.96 $$\mu$$W.
 * b) 5.71 $$\mu$$W.
 * c) 6.56 $$\mu$$W.
 * d) 7.55 $$\mu$$W.
 * e) 8.68 $$\mu$$W.

T4 C1
1) An ideal 5.2 V voltage source is connected to two resistors in parallel.  One is 1.2$$k\Omega$$, and the other is 3.6 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.94 mA.
 * b) 1.08 mA.
 * c) 1.25 mA.
 * d) 1.43 mA.
 * e) 1.65 mA.

2) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * a) 7.09 $$\mu$$W.
 * b) 8.16 $$\mu$$W.
 * c) 9.38 $$\mu$$W.
 * d) 10.79 $$\mu$$W.
 * e) 12.41 $$\mu$$W.

3) In the circuit shown V=16.1 V, R1=1.18 &Omega;, R2=5.28 &Omega;, and R3=14.8 &Omega;. What is the power dissipated by R2?


 * a) 2.172E+01 W
 * b) 2.389E+01 W
 * c) 2.628E+01 W
 * d) 2.891E+01 W
 * e) 3.180E+01 W

4) A make-believe metal has a density of 1.480E+04 kg/m3 and an atomic mass of 73.3 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 1.105E+29 e&minus;/m3
 * b) 1.215E+29 e&minus;/m3
 * c) 1.337E+29 e&minus;/m3
 * d) 1.471E+29 e&minus;/m3
 * e) 1.618E+29 e&minus;/m3

5) Two sources of emf &epsilon;1=13.6 V, and  &epsilon;2=6.53 V are oriented as shownin the circuit. The resistances are R1=2.89 k&Omega; and  R2=2.12 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.11 mA and I4=0.311 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 7.264E-01 mA
 * b) 7.990E-01 mA
 * c) 8.789E-01 mA
 * d) 9.668E-01 mA
 * e) 1.063E+00 mA

6) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * a) I = 5A &  P = 25W.
 * b) I = 5A &  P = 5W.
 * c) I = 5A &  P = 3W.
 * d) I = 5A &  P = 9W

7) The diameter of a copper wire is 9.2 mm, and it carries a current of 64 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 4.91 x 10-5m/s
 * b) 5.95 x 10-5m/s
 * c) 7.2 x 10-5m/s
 * d) 8.73 x 10-5m/s
 * e) 1.06 x 10-4m/s

8) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * a) 7.85 x 10-3 W
 * b) 9.51 x 10-3 W
 * c) 1.15 x 10-2 W
 * d) 1.4 x 10-2 W
 * e) 1.69 x 10-2 W

9) Calculate the resistance of a 12-gauge copper wire that is 48 m long and carries a current of 50 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 2.215E-01 &Omega;
 * b) 2.436E-01 &Omega;
 * c) 2.680E-01 &Omega;
 * d) 2.948E-01 &Omega;
 * e) 3.243E-01 &Omega;

10) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * a) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity
 * b) It is not possible to connect that Number of Resistors in parallel.
 * c) None of these are true.
 * d) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.

T4 C2
1) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * a) It is not possible to connect that Number of Resistors in parallel.
 * b) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * c) None of these are true.
 * d) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity

2) In the circuit shown V=13.5 V, R1=2.66 &Omega;, R2=7.29 &Omega;, and R3=14.5 &Omega;. What is the power dissipated by R2?


 * a) 7.123E+00 W
 * b) 7.835E+00 W
 * c) 8.618E+00 W
 * d) 9.480E+00 W
 * e) 1.043E+01 W

3) A 4 volt battery moves 19 Coulombs of charge in 1.3 hours. What is the power?


 * a) 1.62 x 10-2 W
 * b) 1.97 x 10-2 W
 * c) 2.38 x 10-2 W
 * d) 2.89 x 10-2 W
 * e) 3.5 x 10-2 W

4) Calculate the resistance of a 12-gauge copper wire that is 52 m long and carries a current of 99 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 1.983E-01 &Omega;
 * b) 2.181E-01 &Omega;
 * c) 2.399E-01 &Omega;
 * d) 2.639E-01 &Omega;
 * e) 2.903E-01 &Omega;

5) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * a) I = 5A &  P = 3W.
 * b) I = 5A &  P = 9W
 * c) I = 5A &  P = 25W.
 * d) I = 5A &  P = 5W.

6) Two sources of emf &epsilon;1=43.0 V, and  &epsilon;2=13.8 V are oriented as shownin the circuit. The resistances are R1=3.97 k&Omega; and  R2=1.12 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=6.25 mA and I4=1.82 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 3.661E+00 mA
 * b) 4.027E+00 mA
 * c) 4.430E+00 mA
 * d) 4.873E+00 mA
 * e) 5.360E+00 mA

7) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.7 x 10-4m/s
 * b) 3.27 x 10-4m/s
 * c) 3.96 x 10-4m/s
 * d) 4.79 x 10-4m/s
 * e) 5.81 x 10-4m/s

8) A battery has an emf of 5.5 volts, and an internal resistance of 296 $$k\Omega$$. It is connected to a 3.3 $$M\Omega$$ resistor.  What power is developed in the 3.3  $$M\Omega$$ resistor?


 * a) 7.72 $$\mu$$W.
 * b) 8.88 $$\mu$$W.
 * c) 10.21 $$\mu$$W.
 * d) 11.74 $$\mu$$W.
 * e) 13.5 $$\mu$$W.

9) A make-believe metal has a density of 6.650E+03 kg/m3 and an atomic mass of 67.5 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 4.456E+28 e&minus;/m3
 * b) 4.901E+28 e&minus;/m3
 * c) 5.392E+28 e&minus;/m3
 * d) 5.931E+28 e&minus;/m3
 * e) 6.524E+28 e&minus;/m3

10) An ideal 4.2 V voltage source is connected to two resistors in parallel.  One is 1.6$$k\Omega$$, and the other is 2.1 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.75 mA.
 * b) 0.86 mA.
 * c) 0.99 mA.
 * d) 1.14 mA.
 * e) 1.31 mA.

T4 D0
1) A device requires consumes 168 W of power and requires 11.0 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 1.901E+06 A/m2
 * b) 2.091E+06 A/m2
 * c) 2.300E+06 A/m2
 * d) 2.530E+06 A/m2
 * e) 2.783E+06 A/m2

2) What is the average current involved when a truck battery sets in motion 889 C of charge in 3.64 s while starting an engine?


 * a) 2.442E+02 A
 * b) 2.687E+02 A
 * c) 2.955E+02 A
 * d) 3.251E+02 A
 * e) 3.576E+02 A

3) Three resistors, R1 = 1.2 &Omega;, and R2 = R2 = 2.75 &Omega;, are connected in parallel to a 6.42 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 2.581E+01 W
 * b) 2.839E+01 W
 * c) 3.122E+01 W
 * d) 3.435E+01 W
 * e) 3.778E+01 W

4) A battery with a terminal voltage of 10.6 V is connected to a circuit consisting of 2 21.1 &Omega; resistors and one 12.8 &Omega; resistor. What is the voltage drop across the 12.8 &Omega; resistor?


 * a) 2.467E+00 V
 * b) 2.714E+00 V
 * c) 2.985E+00 V
 * d) 3.283E+00 V
 * e) 3.612E+00 V

5) A 5.8 volt battery moves 95 Coulombs of charge in 0.3 hours. What is the power?


 * a) 4.21 x 10-1 W
 * b) 5.1 x 10-1 W
 * c) 6.18 x 10-1 W
 * d) 7.49 x 10-1 W
 * e) 9.07 x 10-1 W

6) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * a) 5.42 x 102 &Omega;
 * b) 6.57 x 102 &Omega;
 * c) 7.95 x 102 &Omega;
 * d) 9.64 x 102 &Omega;
 * e) 1.17 x 103 &Omega;

7) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * a) 2.2W
 * b) 3W
 * c) 24W
 * d) 8W

8) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{7}\Omega$$.
 * b) $$\frac{7}{10}\Omega$$.
 * c) $$\frac{6}{10}\Omega$$.
 * d) $$\frac{10}{6}\Omega$$.

9) An ideal 3.6 V voltage source is connected to two resistors in parallel.  One is 2.2$$k\Omega$$, and the other is 4.2 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.43 mA.
 * b) 0.49 mA.
 * c) 0.56 mA.
 * d) 0.65 mA.
 * e) 0.74 mA.

10) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.1 ohms.
 * b) 7 ohms.
 * c) 8.1 ohms.
 * d) 9.3 ohms.
 * e) 10.7 ohms.

T4 D1
1) What is the average current involved when a truck battery sets in motion 559 C of charge in 4.13 s while starting an engine?


 * a) 9.245E+01 A
 * b) 1.017E+02 A
 * c) 1.119E+02 A
 * d) 1.230E+02 A
 * e) 1.354E+02 A

2) A battery with a terminal voltage of 13.2 V is connected to a circuit consisting of 3 15.7 &Omega; resistors and one 10.3 &Omega; resistor. What is the voltage drop across the 10.3 &Omega; resistor?


 * a) 1.958E+00 V
 * b) 2.153E+00 V
 * c) 2.369E+00 V
 * d) 2.606E+00 V
 * e) 2.866E+00 V

3) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * a) 5.42 x 102 &Omega;
 * b) 6.57 x 102 &Omega;
 * c) 7.95 x 102 &Omega;
 * d) 9.64 x 102 &Omega;
 * e) 1.17 x 103 &Omega;

4) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * a) 4.43 x 10-2 W
 * b) 5.37 x 10-2 W
 * c) 6.51 x 10-2 W
 * d) 7.88 x 10-2 W
 * e) 9.55 x 10-2 W

5) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 1.47 mA.
 * b) 1.69 mA.
 * c) 1.94 mA.
 * d) 2.23 mA.
 * e) 2.57 mA.

6) Three resistors, R1 = 1.25 &Omega;, and R2 = R2 = 2.82 &Omega;, are connected in parallel to a 8.6 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 4.890E+01 W
 * b) 5.379E+01 W
 * c) 5.917E+01 W
 * d) 6.508E+01 W
 * e) 7.159E+01 W

7) A 6.6 ohm resistor is connected in series to a pair of 6.4 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.4 ohms.
 * b) 7.4 ohms.
 * c) 8.5 ohms.
 * d) 9.8 ohms.
 * e) 11.3 ohms.

8) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{7}\Omega$$.
 * b) $$\frac{10}{6}\Omega$$.
 * c) $$\frac{6}{10}\Omega$$.
 * d) $$\frac{7}{10}\Omega$$.

9) A device requires consumes 196 W of power and requires 2.4 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 4.563E+05 A/m2
 * b) 5.019E+05 A/m2
 * c) 5.521E+05 A/m2
 * d) 6.073E+05 A/m2
 * e) 6.680E+05 A/m2

10) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * a) 2.2W
 * b) 3W
 * c) 8W
 * d) 24W

T4 D2
1) A 6.6 ohm resistor is connected in series to a pair of 6.4 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.4 ohms.
 * b) 7.4 ohms.
 * c) 8.5 ohms.
 * d) 9.8 ohms.
 * e) 11.3 ohms.

2) A device requires consumes 166 W of power and requires 9.99 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 1.570E+06 A/m2
 * b) 1.727E+06 A/m2
 * c) 1.899E+06 A/m2
 * d) 2.089E+06 A/m2
 * e) 2.298E+06 A/m2

3) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{6}{10}\Omega$$.
 * b) $$\frac{10}{7}\Omega$$.
 * c) $$\frac{7}{10}\Omega$$.
 * d) $$\frac{10}{6}\Omega$$.

4) What is the average current involved when a truck battery sets in motion 546 C of charge in 3.7 s while starting an engine?


 * a) 1.220E+02 A
 * b) 1.342E+02 A
 * c) 1.476E+02 A
 * d) 1.623E+02 A
 * e) 1.786E+02 A

5) An ideal 5.6 V voltage source is connected to two resistors in parallel.  One is 2.3$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.56 mA.
 * b) 0.64 mA.
 * c) 0.74 mA.
 * d) 0.85 mA.
 * e) 0.98 mA.

6) Three resistors, R1 = 1.74 &Omega;, and R2 = R2 = 3.92 &Omega;, are connected in parallel to a 8.5 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 2.836E+01 W
 * b) 3.120E+01 W
 * c) 3.432E+01 W
 * d) 3.775E+01 W
 * e) 4.152E+01 W

7) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * a) 2.2W
 * b) 24W
 * c) 3W
 * d) 8W

8) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * a) 2.61 x 10-2 W
 * b) 3.16 x 10-2 W
 * c) 3.83 x 10-2 W
 * d) 4.64 x 10-2 W
 * e) 5.62 x 10-2 W

9) A 196 Watt DC motor draws 0.35 amps of current. What is effective resistance?


 * a) 1.6 x 103 &Omega;
 * b) 1.94 x 103 &Omega;
 * c) 2.35 x 103 &Omega;
 * d) 2.85 x 103 &Omega;
 * e) 3.45 x 103 &Omega;

10) A battery with a terminal voltage of 8.41 V is connected to a circuit consisting of 3 16.1 &Omega; resistors and one 10.9 &Omega; resistor. What is the voltage drop across the 10.9 &Omega; resistor?


 * a) 1.058E+00 V
 * b) 1.163E+00 V
 * c) 1.280E+00 V
 * d) 1.408E+00 V
 * e) 1.548E+00 V

T4 E0
1) What is consumer cost to operate one 102&minus;W incandescent bulb for 5 hours per day for 1 year (365 days) if the cost of electricity is $0.149 per kilowatt-hour?


 * a) $2.292E+01
 * b) $2.521E+01
 * c) $2.774E+01
 * d) $3.051E+01
 * e) $3.356E+01

2) What is the average current involved when a truck battery sets in motion 760 C of charge in 5.35 s while starting an engine?


 * a) 1.291E+02 A
 * b) 1.421E+02 A
 * c) 1.563E+02 A
 * d) 1.719E+02 A
 * e) 1.891E+02 A

3) Three resistors, R1 = 0.61 &Omega;, and R2 = R2 = 1.35 &Omega;, are connected in parallel to a 7.04 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 7.386E+01 W
 * b) 8.125E+01 W
 * c) 8.937E+01 W
 * d) 9.831E+01 W
 * e) 1.081E+02 W

4) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 467 V.  If the combined external and internal resistance is 172 &Omega and the capacitance is  74 mF, how long will it take for the capacitor's voltage to reach 258.0 V?


 * a) 7.688E+00 s
 * b) 8.457E+00 s
 * c) 9.303E+00 s
 * d) 1.023E+01 s
 * e) 1.126E+01 s

5) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * a) 4.14 x 10-2 W
 * b) 5.02 x 10-2 W
 * c) 6.08 x 10-2 W
 * d) 7.37 x 10-2 W
 * e) 8.93 x 10-2 W

6) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.77 x 10-5m/s
 * b) 3.36 x 10-5m/s
 * c) 4.06 x 10-5m/s
 * d) 4.92 x 10-5m/s
 * e) 5.97 x 10-5m/s

7) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * a) None of these are ture.
 * b) 2.5 Watts
 * c) 1.67 Watts
 * d) 11.67 Joules

8) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$2.5\Omega.$$
 * b) $$4.5\Omega.$$
 * c) $$3.5\Omega.$$
 * d) None of these are true.

9) An ideal 4.2 V voltage source is connected to two resistors in parallel.  One is 1.6$$k\Omega$$, and the other is 2.1 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.75 mA.
 * b) 0.86 mA.
 * c) 0.99 mA.
 * d) 1.14 mA.
 * e) 1.31 mA.

10) A battery has an emf of 7.8 volts, and an internal resistance of 351 $$k\Omega$$. It is connected to a 4.2 $$M\Omega$$ resistor.  What power is developed in the 4.2  $$M\Omega$$ resistor?


 * a) 12.34 $$\mu$$W.
 * b) 14.19 $$\mu$$W.
 * c) 16.32 $$\mu$$W.
 * d) 18.76 $$\mu$$W.
 * e) 21.58 $$\mu$$W.

T4 E1
1) A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?


 * a) 4.06 x 10-2 W
 * b) 4.92 x 10-2 W
 * c) 5.96 x 10-2 W
 * d) 7.22 x 10-2 W
 * e) 8.75 x 10-2 W

2) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) None of these are true.
 * b) $$3.5\Omega.$$
 * c) $$2.5\Omega.$$
 * d) $$4.5\Omega.$$

3) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.07 x 10-5m/s
 * b) 3.72 x 10-5m/s
 * c) 4.5 x 10-5m/s
 * d) 5.46 x 10-5m/s
 * e) 6.61 x 10-5m/s

4) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * a) 7.09 $$\mu$$W.
 * b) 8.16 $$\mu$$W.
 * c) 9.38 $$\mu$$W.
 * d) 10.79 $$\mu$$W.
 * e) 12.41 $$\mu$$W.

5) What is consumer cost to operate one 74&minus;W incandescent bulb for 9 hours per day for 1 year (365 days) if the cost of electricity is $0.119 per kilowatt-hour?


 * a) $1.976E+01
 * b) $2.173E+01
 * c) $2.391E+01
 * d) $2.630E+01
 * e) $2.893E+01

6) Three resistors, R1 = 1.82 &Omega;, and R2 = R2 = 4.14 &Omega;, are connected in parallel to a 5.65 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.754E+01 W
 * b) 1.929E+01 W
 * c) 2.122E+01 W
 * d) 2.335E+01 W
 * e) 2.568E+01 W

7) An ideal 7.9 V voltage source is connected to two resistors in parallel.  One is 2.4$$k\Omega$$, and the other is 5.2 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.68 mA.
 * b) 0.79 mA.
 * c) 0.9 mA.
 * d) 1.04 mA.
 * e) 1.2 mA.

8) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * a) 11.67 Joules
 * b) 2.5 Watts
 * c) 1.67 Watts
 * d) None of these are ture.

9) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 466 V.  If the combined external and internal resistance is 123 &Omega and the capacitance is  76 mF, how long will it take for the capacitor's voltage to reach 331.0 V?


 * a) 9.571E+00 s
 * b) 1.053E+01 s
 * c) 1.158E+01 s
 * d) 1.274E+01 s
 * e) 1.401E+01 s

10) What is the average current involved when a truck battery sets in motion 728 C of charge in 3.94 s while starting an engine?


 * a) 1.848E+02 A
 * b) 2.032E+02 A
 * c) 2.236E+02 A
 * d) 2.459E+02 A
 * e) 2.705E+02 A

T4 E2
1) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * a) 2.61 x 10-2 W
 * b) 3.16 x 10-2 W
 * c) 3.83 x 10-2 W
 * d) 4.64 x 10-2 W
 * e) 5.62 x 10-2 W

2) An ideal 3.1 V voltage source is connected to two resistors in parallel.  One is 1.5$$k\Omega$$, and the other is 2.2 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.55 mA.
 * b) 0.63 mA.
 * c) 0.73 mA.
 * d) 0.84 mA.
 * e) 0.96 mA.

3) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * a) 11.67 Joules
 * b) None of these are ture.
 * c) 2.5 Watts
 * d) 1.67 Watts

4) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * a) 7.09 $$\mu$$W.
 * b) 8.16 $$\mu$$W.
 * c) 9.38 $$\mu$$W.
 * d) 10.79 $$\mu$$W.
 * e) 12.41 $$\mu$$W.

5) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$4.5\Omega.$$
 * b) $$3.5\Omega.$$
 * c) $$2.5\Omega.$$
 * d) None of these are true.

6) Three resistors, R1 = 1.41 &Omega;, and R2 = R2 = 3.17 &Omega;, are connected in parallel to a 5.89 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.681E+01 W
 * b) 1.849E+01 W
 * c) 2.033E+01 W
 * d) 2.237E+01 W
 * e) 2.460E+01 W

7) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 351 V.  If the combined external and internal resistance is 148 &Omega and the capacitance is  60 mF, how long will it take for the capacitor's voltage to reach 227.0 V?


 * a) 9.240E+00 s
 * b) 1.016E+01 s
 * c) 1.118E+01 s
 * d) 1.230E+01 s
 * e) 1.353E+01 s

8) What is the average current involved when a truck battery sets in motion 760 C of charge in 5.35 s while starting an engine?


 * a) 1.291E+02 A
 * b) 1.421E+02 A
 * c) 1.563E+02 A
 * d) 1.719E+02 A
 * e) 1.891E+02 A

9) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.82 x 10-4m/s
 * b) 4.63 x 10-4m/s
 * c) 5.61 x 10-4m/s
 * d) 6.8 x 10-4m/s
 * e) 8.24 x 10-4m/s

10) What is consumer cost to operate one 65&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.134 per kilowatt-hour?


 * a) $2.866E+01
 * b) $3.153E+01
 * c) $3.468E+01
 * d) $3.815E+01
 * e) $4.196E+01

T4 F0
1) A DC winch moter draws 12 amps at 129 volts as it lifts a 4.210E+03 N weight at a constant speed of 0.318 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 9.924E-01 &Omega;
 * b) 1.092E+00 &Omega;
 * c) 1.201E+00 &Omega;
 * d) 1.321E+00 &Omega;
 * e) 1.453E+00 &Omega;

2) A make-believe metal has a density of 1.580E+04 kg/m3 and an atomic mass of 41.5 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 2.292E+29 e&minus;/m3
 * b) 2.521E+29 e&minus;/m3
 * c) 2.773E+29 e&minus;/m3
 * d) 3.051E+29 e&minus;/m3
 * e) 3.356E+29 e&minus;/m3

3) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.788E+01 W
 * b) 1.967E+01 W
 * c) 2.163E+01 W
 * d) 2.380E+01 W
 * e) 2.617E+01 W

4) Two sources of emf &epsilon;1=31.0 V, and  &epsilon;2=10.0 V are oriented as shownin the circuit. The resistances are R1=4.22 k&Omega; and  R2=1.37 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.32 mA and I4=1.03 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 2.290E+00 mA
 * b) 2.519E+00 mA
 * c) 2.771E+00 mA
 * d) 3.048E+00 mA
 * e) 3.353E+00 mA

5) A 3.1 volt battery moves 52 Coulombs of charge in 1.7 hours. What is the power?


 * a) 1.79 x 10-2 W
 * b) 2.17 x 10-2 W
 * c) 2.63 x 10-2 W
 * d) 3.19 x 10-2 W
 * e) 3.87 x 10-2 W

6) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * a) 2.28 x 103 &Omega;
 * b) 2.76 x 103 &Omega;
 * c) 3.34 x 103 &Omega;
 * d) 4.05 x 103 &Omega;
 * e) 4.91 x 103 &Omega;

7) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * a) $$R_{Total} = 3\Omega$$.
 * b) $$R_{Total} = 0.5454\Omega$$.
 * c) $$R_{Total} = 6\Omega$$.
 * d) None of these are true.

8) Three 1 ohm resistors are connected in parallel. What is the total resistance?
 * a) $$\frac{1}{3}\Omega$$.
 * b) $$ 3\Omega$$.
 * c) $$\frac{2}{3}\Omega$$.
 * d) $$\frac{3}{2}\Omega$$.

9) A battery has an emf of 7.8 volts, and an internal resistance of 351 $$k\Omega$$. It is connected to a 4.2 $$M\Omega$$ resistor.  What power is developed in the 4.2  $$M\Omega$$ resistor?


 * a) 12.34 $$\mu$$W.
 * b) 14.19 $$\mu$$W.
 * c) 16.32 $$\mu$$W.
 * d) 18.76 $$\mu$$W.
 * e) 21.58 $$\mu$$W.

10) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * a) 9.9 ohms.
 * b) 11.4 ohms.
 * c) 13.1 ohms.
 * d) 15.1 ohms.
 * e) 17.3 ohms.

T4 F1
1) Three 1 ohm resistors are connected in parallel. What is the total resistance?
 * a) $$\frac{2}{3}\Omega$$.
 * b) $$\frac{1}{3}\Omega$$.
 * c) $$\frac{3}{2}\Omega$$.
 * d) $$ 3\Omega$$.

2) Three resistors, R1 = 0.548 &Omega;, and R2 = R2 = 1.24 &Omega;, are connected in parallel to a 7.16 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 7.029E+01 W
 * b) 7.731E+01 W
 * c) 8.505E+01 W
 * d) 9.355E+01 W
 * e) 1.029E+02 W

3) Two 6.6 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * a) 4.4 ohms.
 * b) 5.1 ohms.
 * c) 5.8 ohms.
 * d) 6.7 ohms.
 * e) 7.7 ohms.

4) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * a) 7.74 x 102 &Omega;
 * b) 9.38 x 102 &Omega;
 * c) 1.14 x 103 &Omega;
 * d) 1.38 x 103 &Omega;
 * e) 1.67 x 103 &Omega;

5) Two sources of emf &epsilon;1=24.8 V, and  &epsilon;2=10.3 V are oriented as shownin the circuit. The resistances are R1=2.19 k&Omega; and  R2=1.6 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.49 mA and I4=0.83 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.660E+00 mA
 * b) 1.826E+00 mA
 * c) 2.009E+00 mA
 * d) 2.209E+00 mA
 * e) 2.430E+00 mA

6) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * a) 7.09 $$\mu$$W.
 * b) 8.16 $$\mu$$W.
 * c) 9.38 $$\mu$$W.
 * d) 10.79 $$\mu$$W.
 * e) 12.41 $$\mu$$W.

7) A make-believe metal has a density of 1.480E+04 kg/m3 and an atomic mass of 196.0 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 4.546E+28 e&minus;/m3
 * b) 5.000E+28 e&minus;/m3
 * c) 5.500E+28 e&minus;/m3
 * d) 6.050E+28 e&minus;/m3
 * e) 6.655E+28 e&minus;/m3

8) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * a) $$R_{Total} = 0.5454\Omega$$.
 * b) None of these are true.
 * c) $$R_{Total} = 3\Omega$$.
 * d) $$R_{Total} = 6\Omega$$.

9) A DC winch moter draws 23 amps at 196 volts as it lifts a 4.870E+03 N weight at a constant speed of 0.731 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 1.346E+00 &Omega;
 * b) 1.481E+00 &Omega;
 * c) 1.629E+00 &Omega;
 * d) 1.792E+00 &Omega;
 * e) 1.971E+00 &Omega;

10) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * a) 2.61 x 10-2 W
 * b) 3.16 x 10-2 W
 * c) 3.83 x 10-2 W
 * d) 4.64 x 10-2 W
 * e) 5.62 x 10-2 W

T4 F2
1) Three 1 ohm resistors are connected in parallel. What is the total resistance?
 * a) $$\frac{3}{2}\Omega$$.
 * b) $$\frac{1}{3}\Omega$$.
 * c) $$\frac{2}{3}\Omega$$.
 * d) $$ 3\Omega$$.

2) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * a) $$R_{Total} = 0.5454\Omega$$.
 * b) $$R_{Total} = 3\Omega$$.
 * c) None of these are true.
 * d) $$R_{Total} = 6\Omega$$.

3) Three resistors, R1 = 1.39 &Omega;, and R2 = R2 = 3.06 &Omega;, are connected in parallel to a 6.21 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 2.293E+01 W
 * b) 2.522E+01 W
 * c) 2.774E+01 W
 * d) 3.052E+01 W
 * e) 3.357E+01 W

4) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * a) 7.74 x 102 &Omega;
 * b) 9.38 x 102 &Omega;
 * c) 1.14 x 103 &Omega;
 * d) 1.38 x 103 &Omega;
 * e) 1.67 x 103 &Omega;

5) A battery has an emf of 6.7 volts, and an internal resistance of 348 $$k\Omega$$. It is connected to a 3.8 $$M\Omega$$ resistor.  What power is developed in the 3.8  $$M\Omega$$ resistor?


 * a) 9.91 $$\mu$$W.
 * b) 11.4 $$\mu$$W.
 * c) 13.11 $$\mu$$W.
 * d) 15.08 $$\mu$$W.
 * e) 17.34 $$\mu$$W.

6) A DC winch moter draws 19 amps at 175 volts as it lifts a 4.230E+03 N weight at a constant speed of 0.483 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 3.551E+00 &Omega;
 * b) 3.906E+00 &Omega;
 * c) 4.297E+00 &Omega;
 * d) 4.726E+00 &Omega;
 * e) 5.199E+00 &Omega;

7) Two 7.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.8 ohm resistor.  What is the net resistance?


 * a) 5.7 ohms.
 * b) 6.5 ohms.
 * c) 7.5 ohms.
 * d) 8.6 ohms.
 * e) 9.9 ohms.

8) A make-believe metal has a density of 2.670E+03 kg/m3 and an atomic mass of 40.9 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 3.930E+28 e&minus;/m3
 * b) 4.323E+28 e&minus;/m3
 * c) 4.755E+28 e&minus;/m3
 * d) 5.231E+28 e&minus;/m3
 * e) 5.754E+28 e&minus;/m3

9) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * a) 4.43 x 10-2 W
 * b) 5.37 x 10-2 W
 * c) 6.51 x 10-2 W
 * d) 7.88 x 10-2 W
 * e) 9.55 x 10-2 W

10) Two sources of emf &epsilon;1=36.3 V, and  &epsilon;2=12.9 V are oriented as shownin the circuit. The resistances are R1=4.28 k&Omega; and  R2=1.58 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.16 mA and I4=1.2 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 2.224E+00 mA
 * b) 2.446E+00 mA
 * c) 2.691E+00 mA
 * d) 2.960E+00 mA
 * e) 3.256E+00 mA

T4 G0
1) Calculate the electric field in a 12-gauge copper wire that is 44 m long and carries a current of 78 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 2.704E-04 V/m
 * b) 2.974E-04 V/m
 * c) 3.272E-04 V/m
 * d) 3.599E-04 V/m
 * e) 3.959E-04 V/m

2) Imagine a substance could be made into a very hot filament. Suppose the resitance is 4.08 &Omega; at a temperature of 26&deg;C and that the temperature coefficient of expansion is 4.800E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 388 &deg;C?


 * a) 1.064E+01 &Omega;
 * b) 1.117E+01 &Omega;
 * c) 1.173E+01 &Omega;
 * d) 1.231E+01 &Omega;
 * e) 1.293E+01 &Omega;

3) In the circuit shown V=15.4 V, R1=2.77 &Omega;, R2=6.07 &Omega;, and R3=14.5 &Omega;. What is the power dissipated by R2?


 * a) 1.190E+01 W
 * b) 1.309E+01 W
 * c) 1.440E+01 W
 * d) 1.584E+01 W
 * e) 1.742E+01 W

4) Two sources of emf &epsilon;1=16.8 V, and  &epsilon;2=6.85 V are oriented as shownin the circuit. The resistances are R1=4.43 k&Omega; and  R2=1.24 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.68 mA and I4=0.758 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 3.890E+00 V
 * b) 4.279E+00 V
 * c) 4.707E+00 V
 * d) 5.178E+00 V
 * e) 5.695E+00 V

5) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * a) 4.43 x 10-2 W
 * b) 5.37 x 10-2 W
 * c) 6.51 x 10-2 W
 * d) 7.88 x 10-2 W
 * e) 9.55 x 10-2 W

6) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * a) 8.42 x 101 volts
 * b) 1.02 x 102 volts
 * c) 1.24 x 102 volts
 * d) 1.5 x 102 volts
 * e) 1.81 x 102 volts

7) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * a) $$R_1 = 125V$$ and $$R_2 = 125V$$.
 * b) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * c) None of these are true.
 * d) $$R_1 = 250V$$ and $$R_2 = 0V$$.

8) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * a) None of these are true.
 * b) One has full voltage, the other has none.
 * c) The voltage across both resistors is the same as the source.
 * d) The voltage across both resistors is half the voltage of the source.

9) A 6.6 ohm resistor is connected in series to a pair of 6.4 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.4 ohms.
 * b) 7.4 ohms.
 * c) 8.5 ohms.
 * d) 9.8 ohms.
 * e) 11.3 ohms.

10) An ideal 9.2 V voltage source is connected to two resistors in parallel.  One is 1.1$$k\Omega$$, and the other is 2.4 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 2.29 mA.
 * b) 2.63 mA.
 * c) 3.02 mA.
 * d) 3.48 mA.
 * e) 4 mA.

T4 G1
1) Calculate the electric field in a 12-gauge copper wire that is 26 m long and carries a current of 24 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 9.152E-05 V/m
 * b) 1.007E-04 V/m
 * c) 1.107E-04 V/m
 * d) 1.218E-04 V/m
 * e) 1.340E-04 V/m

2) A 5.7 ohm resistor is connected in series to a pair of 3.8 ohm resistors that are in parallel.  What is the net resistance?


 * a) 5 ohms.
 * b) 5.7 ohms.
 * c) 6.6 ohms.
 * d) 7.6 ohms.
 * e) 8.7 ohms.

3) Imagine a substance could be made into a very hot filament. Suppose the resitance is 4.48 &Omega; at a temperature of 56&deg;C and that the temperature coefficient of expansion is 4.550E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 449 &deg;C?


 * a) 1.028E+01 &Omega;
 * b) 1.079E+01 &Omega;
 * c) 1.133E+01 &Omega;
 * d) 1.190E+01 &Omega;
 * e) 1.249E+01 &Omega;

4) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * a) 4.43 x 10-2 W
 * b) 5.37 x 10-2 W
 * c) 6.51 x 10-2 W
 * d) 7.88 x 10-2 W
 * e) 9.55 x 10-2 W

5) Two sources of emf &epsilon;1=38.9 V, and  &epsilon;2=14.4 V are oriented as shownin the circuit. The resistances are R1=4.33 k&Omega; and  R2=1.65 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=5.59 mA and I4=1.07 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 9.142E+00 V
 * b) 1.006E+01 V
 * c) 1.106E+01 V
 * d) 1.217E+01 V
 * e) 1.338E+01 V

6) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * a) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * b) $$R_1 = 125V$$ and $$R_2 = 125V$$.
 * c) $$R_1 = 250V$$ and $$R_2 = 0V$$.
 * d) None of these are true.

7) An ideal 5.2 V voltage source is connected to two resistors in parallel.  One is 1.2$$k\Omega$$, and the other is 3.6 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.94 mA.
 * b) 1.08 mA.
 * c) 1.25 mA.
 * d) 1.43 mA.
 * e) 1.65 mA.

8) In the circuit shown V=18.4 V, R1=1.64 &Omega;, R2=6.56 &Omega;, and R3=12.8 &Omega;. What is the power dissipated by R2?


 * a) 2.470E+01 W
 * b) 2.717E+01 W
 * c) 2.989E+01 W
 * d) 3.288E+01 W
 * e) 3.617E+01 W

9) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * a) None of these are true.
 * b) The voltage across both resistors is the same as the source.
 * c) The voltage across both resistors is half the voltage of the source.
 * d) One has full voltage, the other has none.

10) A power supply delivers 138 watts of power to a 206 ohm resistor.  What was the applied voltage?


 * a) 1.39 x 102 volts
 * b) 1.69 x 102 volts
 * c) 2.04 x 102 volts
 * d) 2.47 x 102 volts
 * e) 3 x 102 volts

T4 G2
1) A power supply delivers 114 watts of power to a 294 ohm resistor.  What was the applied voltage?


 * a) 1.25 x 102 volts
 * b) 1.51 x 102 volts
 * c) 1.83 x 102 volts
 * d) 2.22 x 102 volts
 * e) 2.69 x 102 volts

2) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * a) 2.61 x 10-2 W
 * b) 3.16 x 10-2 W
 * c) 3.83 x 10-2 W
 * d) 4.64 x 10-2 W
 * e) 5.62 x 10-2 W

3) Imagine a substance could be made into a very hot filament. Suppose the resitance is 2.61 &Omega; at a temperature of 92&deg;C and that the temperature coefficient of expansion is 4.260E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 422 &deg;C?


 * a) 6.279E+00 &Omega;
 * b) 6.593E+00 &Omega;
 * c) 6.923E+00 &Omega;
 * d) 7.269E+00 &Omega;
 * e) 7.632E+00 &Omega;

4) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * a) $$R_1 = 250V$$ and $$R_2 = 0V$$.
 * b) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * c) $$R_1 = 125V$$ and $$R_2 = 125V$$.
 * d) None of these are true.

5) Calculate the electric field in a 12-gauge copper wire that is 62 m long and carries a current of 52 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 1.983E-04 V/m
 * b) 2.181E-04 V/m
 * c) 2.399E-04 V/m
 * d) 2.639E-04 V/m
 * e) 2.903E-04 V/m

6) Two sources of emf &epsilon;1=30.6 V, and  &epsilon;2=12.0 V are oriented as shownin the circuit. The resistances are R1=3.46 k&Omega; and  R2=2.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.97 mA and I4=0.643 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 4.986E+00 V
 * b) 5.484E+00 V
 * c) 6.033E+00 V
 * d) 6.636E+00 V
 * e) 7.299E+00 V

7) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * a) The voltage across both resistors is the same as the source.
 * b) None of these are true.
 * c) One has full voltage, the other has none.
 * d) The voltage across both resistors is half the voltage of the source.

8) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * a) 8.3 ohms.
 * b) 9.6 ohms.
 * c) 11 ohms.
 * d) 12.7 ohms.
 * e) 14.5 ohms.

9) An ideal 3.1 V voltage source is connected to two resistors in parallel.  One is 1.5$$k\Omega$$, and the other is 2.2 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.55 mA.
 * b) 0.63 mA.
 * c) 0.73 mA.
 * d) 0.84 mA.
 * e) 0.96 mA.

10) In the circuit shown V=11.8 V, R1=2.38 &Omega;, R2=5.11 &Omega;, and R3=14.6 &Omega;. What is the power dissipated by R2?


 * a) 8.489E+00 W
 * b) 9.338E+00 W
 * c) 1.027E+01 W
 * d) 1.130E+01 W
 * e) 1.243E+01 W

T4 H0
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 5.89 &Omega; at a temperature of 43&deg;C and that the temperature coefficient of expansion is 4.400E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 398 &deg;C?


 * a) 1.369E+01 &Omega;
 * b) 1.437E+01 &Omega;
 * c) 1.509E+01 &Omega;
 * d) 1.584E+01 &Omega;
 * e) 1.664E+01 &Omega;

2) What is the average current involved when a truck battery sets in motion 889 C of charge in 3.64 s while starting an engine?


 * a) 2.442E+02 A
 * b) 2.687E+02 A
 * c) 2.955E+02 A
 * d) 3.251E+02 A
 * e) 3.576E+02 A

3) Three resistors, R1 = 1.39 &Omega;, and R2 = R2 = 3.06 &Omega;, are connected in parallel to a 6.21 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 2.293E+01 W
 * b) 2.522E+01 W
 * c) 2.774E+01 W
 * d) 3.052E+01 W
 * e) 3.357E+01 W

4) In the circuit shown V=15.2 V, R1=1.6 &Omega;, R2=7.89 &Omega;, and R3=15.3 &Omega;. What is the power dissipated by R2?


 * a) 1.713E+01 W
 * b) 1.885E+01 W
 * c) 2.073E+01 W
 * d) 2.280E+01 W
 * e) 2.508E+01 W

5) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * a) 7.85 x 10-3 W
 * b) 9.51 x 10-3 W
 * c) 1.15 x 10-2 W
 * d) 1.4 x 10-2 W
 * e) 1.69 x 10-2 W

6) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * a) 5.42 x 102 &Omega;
 * b) 6.57 x 102 &Omega;
 * c) 7.95 x 102 &Omega;
 * d) 9.64 x 102 &Omega;
 * e) 1.17 x 103 &Omega;

7) What is the current through R1, R2, R3, and R4 in the figure shown?
 * a) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * b) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * c) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * d) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..

8) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{7}\Omega$$.
 * b) $$\frac{10}{6}\Omega$$.
 * c) $$\frac{7}{10}\Omega$$.
 * d) $$\frac{6}{10}\Omega$$.

9) A battery has an emf of 7.8 volts, and an internal resistance of 351 $$k\Omega$$. It is connected to a 4.2 $$M\Omega$$ resistor.  What power is developed in the 4.2  $$M\Omega$$ resistor?


 * a) 12.34 $$\mu$$W.
 * b) 14.19 $$\mu$$W.
 * c) 16.32 $$\mu$$W.
 * d) 18.76 $$\mu$$W.
 * e) 21.58 $$\mu$$W.

10) An ideal 5.2 V voltage source is connected to two resistors in parallel.  One is 1.2$$k\Omega$$, and the other is 3.6 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.94 mA.
 * b) 1.08 mA.
 * c) 1.25 mA.
 * d) 1.43 mA.
 * e) 1.65 mA.

T4 H1
1) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * a) 2.61 x 10-2 W
 * b) 3.16 x 10-2 W
 * c) 3.83 x 10-2 W
 * d) 4.64 x 10-2 W
 * e) 5.62 x 10-2 W

2) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * a) 5.42 x 102 &Omega;
 * b) 6.57 x 102 &Omega;
 * c) 7.95 x 102 &Omega;
 * d) 9.64 x 102 &Omega;
 * e) 1.17 x 103 &Omega;

3) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.788E+01 W
 * b) 1.967E+01 W
 * c) 2.163E+01 W
 * d) 2.380E+01 W
 * e) 2.617E+01 W

4) In the circuit shown V=17.8 V, R1=2.27 &Omega;, R2=6.79 &Omega;, and R3=15.1 &Omega;. What is the power dissipated by R2?


 * a) 1.446E+01 W
 * b) 1.591E+01 W
 * c) 1.750E+01 W
 * d) 1.925E+01 W
 * e) 2.117E+01 W

5) Imagine a substance could be made into a very hot filament. Suppose the resitance is 3.64 &Omega; at a temperature of 82&deg;C and that the temperature coefficient of expansion is 4.530E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 390 &deg;C?


 * a) 7.532E+00 &Omega;
 * b) 7.908E+00 &Omega;
 * c) 8.303E+00 &Omega;
 * d) 8.719E+00 &Omega;
 * e) 9.155E+00 &Omega;

6) What is the current through R1, R2, R3, and R4 in the figure shown?
 * a) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * b) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * c) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * d) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..

7) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{6}\Omega$$.
 * b) $$\frac{6}{10}\Omega$$.
 * c) $$\frac{10}{7}\Omega$$.
 * d) $$\frac{7}{10}\Omega$$.

8) An ideal 9.9 V voltage source is connected to two resistors in parallel.  One is 0.9$$k\Omega$$, and the other is 1.8 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 3.67 mA.
 * b) 4.22 mA.
 * c) 4.85 mA.
 * d) 5.58 mA.
 * e) 6.41 mA.

9) What is the average current involved when a truck battery sets in motion 728 C of charge in 3.94 s while starting an engine?


 * a) 1.848E+02 A
 * b) 2.032E+02 A
 * c) 2.236E+02 A
 * d) 2.459E+02 A
 * e) 2.705E+02 A

10) A battery has an emf of 7 volts, and an internal resistance of 357 $$k\Omega$$. It is connected to a 2.9 $$M\Omega$$ resistor.  What power is developed in the 2.9  $$M\Omega$$ resistor?


 * a) 13.4 $$\mu$$W.
 * b) 15.4 $$\mu$$W.
 * c) 17.72 $$\mu$$W.
 * d) 20.37 $$\mu$$W.
 * e) 23.43 $$\mu$$W.

T4 H2
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 3.58 &Omega; at a temperature of 24&deg;C and that the temperature coefficient of expansion is 5.520E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 349 &deg;C?


 * a) 9.526E+00 &Omega;
 * b) 1.000E+01 &Omega;
 * c) 1.050E+01 &Omega;
 * d) 1.103E+01 &Omega;
 * e) 1.158E+01 &Omega;

2) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{6}\Omega$$.
 * b) $$\frac{10}{7}\Omega$$.
 * c) $$\frac{7}{10}\Omega$$.
 * d) $$\frac{6}{10}\Omega$$.

3) Three resistors, R1 = 1.74 &Omega;, and R2 = R2 = 3.92 &Omega;, are connected in parallel to a 8.5 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 2.836E+01 W
 * b) 3.120E+01 W
 * c) 3.432E+01 W
 * d) 3.775E+01 W
 * e) 4.152E+01 W

4) A battery has an emf of 5.3 volts, and an internal resistance of 428 $$k\Omega$$. It is connected to a 2.3 $$M\Omega$$ resistor.  What power is developed in the 2.3  $$M\Omega$$ resistor?


 * a) 4.96 $$\mu$$W.
 * b) 5.71 $$\mu$$W.
 * c) 6.56 $$\mu$$W.
 * d) 7.55 $$\mu$$W.
 * e) 8.68 $$\mu$$W.

5) What is the current through R1, R2, R3, and R4 in the figure shown?
 * a) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * b) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * c) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..
 * d) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.

6) A 5.8 volt battery moves 95 Coulombs of charge in 0.3 hours. What is the power?


 * a) 4.21 x 10-1 W
 * b) 5.1 x 10-1 W
 * c) 6.18 x 10-1 W
 * d) 7.49 x 10-1 W
 * e) 9.07 x 10-1 W

7) What is the average current involved when a truck battery sets in motion 572 C of charge in 3.33 s while starting an engine?


 * a) 1.173E+02 A
 * b) 1.291E+02 A
 * c) 1.420E+02 A
 * d) 1.562E+02 A
 * e) 1.718E+02 A

8) In the circuit shown V=17.5 V, R1=2.34 &Omega;, R2=7.1 &Omega;, and R3=15.3 &Omega;. What is the power dissipated by R2?


 * a) 1.784E+01 W
 * b) 1.963E+01 W
 * c) 2.159E+01 W
 * d) 2.375E+01 W
 * e) 2.612E+01 W

9) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 1.47 mA.
 * b) 1.69 mA.
 * c) 1.94 mA.
 * d) 2.23 mA.
 * e) 2.57 mA.

10) A 130 Watt DC motor draws 0.3 amps of current. What is effective resistance?


 * a) 8.12 x 102 &Omega;
 * b) 9.84 x 102 &Omega;
 * c) 1.19 x 103 &Omega;
 * d) 1.44 x 103 &Omega;
 * e) 1.75 x 103 &Omega;

T4 I0
1) What is the average current involved when a truck battery sets in motion 779 C of charge in 3.96 s while starting an engine?


 * a) 1.626E+02 A
 * b) 1.788E+02 A
 * c) 1.967E+02 A
 * d) 2.164E+02 A
 * e) 2.380E+02 A

2) A make-believe metal has a density of 1.510E+04 kg/m3 and an atomic mass of 33.6 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 2.236E+29 e&minus;/m3
 * b) 2.459E+29 e&minus;/m3
 * c) 2.705E+29 e&minus;/m3
 * d) 2.976E+29 e&minus;/m3
 * e) 3.274E+29 e&minus;/m3

3) Three resistors, R1 = 1.41 &Omega;, and R2 = R2 = 3.17 &Omega;, are connected in parallel to a 5.89 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.681E+01 W
 * b) 1.849E+01 W
 * c) 2.033E+01 W
 * d) 2.237E+01 W
 * e) 2.460E+01 W

4) The resistances in the figure shown are R1= 2.73 &Omega;, R2= 1.4 &Omega;, and R2= 2.35 &Omega;. V1 and V3 are text 0.549 V and 1.27 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.584 V. What is the absolute value of the current through R1?


 * a) 1.213E-01 A
 * b) 1.334E-01 A
 * c) 1.468E-01 A
 * d) 1.614E-01 A
 * e) 1.776E-01 A

5) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * a) 8.42 x 101 volts
 * b) 1.02 x 102 volts
 * c) 1.24 x 102 volts
 * d) 1.5 x 102 volts
 * e) 1.81 x 102 volts

6) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.07 x 10-5m/s
 * b) 3.72 x 10-5m/s
 * c) 4.5 x 10-5m/s
 * d) 5.46 x 10-5m/s
 * e) 6.61 x 10-5m/s

7) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * a) 12A
 * b) 2A
 * c) 3A
 * d) 1.5A

8) What is the current through R1 and R2 in the figure shown?
 * a) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * b) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * c) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * d) $$I_1 = 1A$$ and $$I_2 = 25A$$.

9) An ideal 3.1 V voltage source is connected to two resistors in parallel.  One is 1.5$$k\Omega$$, and the other is 2.2 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.55 mA.
 * b) 0.63 mA.
 * c) 0.73 mA.
 * d) 0.84 mA.
 * e) 0.96 mA.

10) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * a) 8.3 ohms.
 * b) 9.6 ohms.
 * c) 11 ohms.
 * d) 12.7 ohms.
 * e) 14.5 ohms.

T4 I1
1) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * a) 8.42 x 101 volts
 * b) 1.02 x 102 volts
 * c) 1.24 x 102 volts
 * d) 1.5 x 102 volts
 * e) 1.81 x 102 volts

2) A make-believe metal has a density of 8.060E+03 kg/m3 and an atomic mass of 19.7 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 1.850E+29 e&minus;/m3
 * b) 2.036E+29 e&minus;/m3
 * c) 2.239E+29 e&minus;/m3
 * d) 2.463E+29 e&minus;/m3
 * e) 2.709E+29 e&minus;/m3

3) The resistances in the figure shown are R1= 2.73 &Omega;, R2= 1.4 &Omega;, and R2= 2.35 &Omega;. V1 and V3 are text 0.549 V and 1.27 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.584 V. What is the absolute value of the current through R1?


 * a) 1.213E-01 A
 * b) 1.334E-01 A
 * c) 1.468E-01 A
 * d) 1.614E-01 A
 * e) 1.776E-01 A

4) What is the current through R1 and R2 in the figure shown?
 * a) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * b) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * c) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * d) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.

5) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.77 x 10-5m/s
 * b) 3.36 x 10-5m/s
 * c) 4.06 x 10-5m/s
 * d) 4.92 x 10-5m/s
 * e) 5.97 x 10-5m/s

6) Three resistors, R1 = 0.87 &Omega;, and R2 = R2 = 2.0 &Omega;, are connected in parallel to a 8.57 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 6.977E+01 W
 * b) 7.674E+01 W
 * c) 8.442E+01 W
 * d) 9.286E+01 W
 * e) 1.021E+02 W

7) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 1.47 mA.
 * b) 1.69 mA.
 * c) 1.94 mA.
 * d) 2.23 mA.
 * e) 2.57 mA.

8) A 6.3 ohm resistor is connected in series to a pair of 3.4 ohm resistors that are in parallel.  What is the net resistance?


 * a) 5.3 ohms.
 * b) 6 ohms.
 * c) 7 ohms.
 * d) 8 ohms.
 * e) 9.2 ohms.

9) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * a) 2A
 * b) 1.5A
 * c) 12A
 * d) 3A

10) What is the average current involved when a truck battery sets in motion 659 C of charge in 5.48 s while starting an engine?


 * a) 8.214E+01 A
 * b) 9.035E+01 A
 * c) 9.938E+01 A
 * d) 1.093E+02 A
 * e) 1.203E+02 A

T4 I2
1) What is the average current involved when a truck battery sets in motion 631 C of charge in 3.8 s while starting an engine?


 * a) 1.661E+02 A
 * b) 1.827E+02 A
 * c) 2.009E+02 A
 * d) 2.210E+02 A
 * e) 2.431E+02 A

2) A 5.6 ohm resistor is connected in series to a pair of 7.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 7 ohms.
 * b) 8 ohms.
 * c) 9.2 ohms.
 * d) 10.6 ohms.
 * e) 12.2 ohms.

3) An ideal 4.2 V voltage source is connected to two resistors in parallel.  One is 1.6$$k\Omega$$, and the other is 2.1 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.75 mA.
 * b) 0.86 mA.
 * c) 0.99 mA.
 * d) 1.14 mA.
 * e) 1.31 mA.

4) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.788E+01 W
 * b) 1.967E+01 W
 * c) 2.163E+01 W
 * d) 2.380E+01 W
 * e) 2.617E+01 W

5) What is the current through R1 and R2 in the figure shown?
 * a) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * b) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * c) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * d) $$I_1 = 1A$$ and $$I_2 = 25A$$.

6) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * a) 3A
 * b) 2A
 * c) 12A
 * d) 1.5A

7) The resistances in the figure shown are R1= 2.24 &Omega;, R2= 1.03 &Omega;, and R2= 2.39 &Omega;. V1 and V3 are text 0.595 V and 2.58 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.707 V. What is the absolute value of the current through R1?


 * a) 1.834E-01 A
 * b) 2.018E-01 A
 * c) 2.220E-01 A
 * d) 2.441E-01 A
 * e) 2.686E-01 A

8) A make-believe metal has a density of 1.480E+04 kg/m3 and an atomic mass of 196.0 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 4.546E+28 e&minus;/m3
 * b) 5.000E+28 e&minus;/m3
 * c) 5.500E+28 e&minus;/m3
 * d) 6.050E+28 e&minus;/m3
 * e) 6.655E+28 e&minus;/m3

9) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.7 x 10-4m/s
 * b) 3.27 x 10-4m/s
 * c) 3.96 x 10-4m/s
 * d) 4.79 x 10-4m/s
 * e) 5.81 x 10-4m/s

10) A power supply delivers 145 watts of power to a 244 ohm resistor.  What was the applied voltage?


 * a) 1.88 x 102 volts
 * b) 2.28 x 102 volts
 * c) 2.76 x 102 volts
 * d) 3.34 x 102 volts
 * e) 4.05 x 102 volts

T4 J0
1) Calculate the electric field in a 12-gauge copper wire that is 16 m long and carries a current of 58 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 2.212E-04 V/m
 * b) 2.433E-04 V/m
 * c) 2.676E-04 V/m
 * d) 2.944E-04 V/m
 * e) 3.238E-04 V/m

2) A make-believe metal has a density of 8.690E+03 kg/m3 and an atomic mass of 48.4 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 1.081E+29 e&minus;/m3
 * b) 1.189E+29 e&minus;/m3
 * c) 1.308E+29 e&minus;/m3
 * d) 1.439E+29 e&minus;/m3
 * e) 1.582E+29 e&minus;/m3

3) In the circuit shown V=15.4 V, R1=2.77 &Omega;, R2=6.07 &Omega;, and R3=14.5 &Omega;. What is the power dissipated by R2?


 * a) 1.190E+01 W
 * b) 1.309E+01 W
 * c) 1.440E+01 W
 * d) 1.584E+01 W
 * e) 1.742E+01 W

4) A battery with a terminal voltage of 13.2 V is connected to a circuit consisting of 3 15.7 &Omega; resistors and one 10.3 &Omega; resistor. What is the voltage drop across the 10.3 &Omega; resistor?


 * a) 1.958E+00 V
 * b) 2.153E+00 V
 * c) 2.369E+00 V
 * d) 2.606E+00 V
 * e) 2.866E+00 V

5) A 3.1 volt battery moves 52 Coulombs of charge in 1.7 hours. What is the power?


 * a) 1.79 x 10-2 W
 * b) 2.17 x 10-2 W
 * c) 2.63 x 10-2 W
 * d) 3.19 x 10-2 W
 * e) 3.87 x 10-2 W

6) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * a) 2.28 x 103 &Omega;
 * b) 2.76 x 103 &Omega;
 * c) 3.34 x 103 &Omega;
 * d) 4.05 x 103 &Omega;
 * e) 4.91 x 103 &Omega;

7) What is the current through R1, R2, R3, and R4 in the figure shown?
 * a) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * b) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * c) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * d) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..

8) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) It's an Electrical Cliche.
 * b) None these are correct
 * c) The other point could be Negative or positive.
 * d) Voltage is a measure of Electric Potential difference between two electrical points.

9) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * a) 3.1 ohms.
 * b) 3.6 ohms.
 * c) 4.2 ohms.
 * d) 4.8 ohms.
 * e) 5.5 ohms.

10) An ideal 7.5 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 19$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 54.3 A.
 * b) 62.4 A.
 * c) 71.8 A.
 * d) 82.6 A.
 * e) 94.9 A.

T4 J1
1) In the circuit shown V=15.4 V, R1=2.55 &Omega;, R2=5.12 &Omega;, and R3=12.7 &Omega;. What is the power dissipated by R2?


 * a) 1.096E+01 W
 * b) 1.206E+01 W
 * c) 1.326E+01 W
 * d) 1.459E+01 W
 * e) 1.605E+01 W

2) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * a) 6.5 ohms.
 * b) 7.5 ohms.
 * c) 8.6 ohms.
 * d) 9.9 ohms.
 * e) 11.4 ohms.

3) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * a) 4.43 x 10-2 W
 * b) 5.37 x 10-2 W
 * c) 6.51 x 10-2 W
 * d) 7.88 x 10-2 W
 * e) 9.55 x 10-2 W

4) A battery with a terminal voltage of 9.88 V is connected to a circuit consisting of 3 15.9 &Omega; resistors and one 10.8 &Omega; resistor. What is the voltage drop across the 10.8 &Omega; resistor?


 * a) 1.370E+00 V
 * b) 1.507E+00 V
 * c) 1.658E+00 V
 * d) 1.824E+00 V
 * e) 2.006E+00 V

5) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) Voltage is a measure of Electric Potential difference between two electrical points.
 * b) The other point could be Negative or positive.
 * c) It's an Electrical Cliche.
 * d) None these are correct

6) A make-believe metal has a density of 7.000E+03 kg/m3 and an atomic mass of 89.4 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 3.219E+28 e&minus;/m3
 * b) 3.541E+28 e&minus;/m3
 * c) 3.896E+28 e&minus;/m3
 * d) 4.285E+28 e&minus;/m3
 * e) 4.714E+28 e&minus;/m3

7) Calculate the electric field in a 12-gauge copper wire that is 78 m long and carries a current of 24 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 1.218E-04 V/m
 * b) 1.340E-04 V/m
 * c) 1.474E-04 V/m
 * d) 1.621E-04 V/m
 * e) 1.783E-04 V/m

8) What is the current through R1, R2, R3, and R4 in the figure shown?
 * a) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * b) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * c) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..
 * d) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.

9) An ideal 6.4 volt battery is connected to a 0.071 ohm resistor.  To measure the current an ammeter with a resistance of 21$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 60.5 A.
 * b) 69.6 A.
 * c) 80 A.
 * d) 92 A.
 * e) 105.8 A.

10) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * a) 2.2 x 103 &Omega;
 * b) 2.67 x 103 &Omega;
 * c) 3.23 x 103 &Omega;
 * d) 3.91 x 103 &Omega;
 * e) 4.74 x 103 &Omega;

T4 J2
1) Calculate the electric field in a 12-gauge copper wire that is 99 m long and carries a current of 71 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.604E-04 V/m
 * b) 3.964E-04 V/m
 * c) 4.360E-04 V/m
 * d) 4.796E-04 V/m
 * e) 5.276E-04 V/m

2) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) None these are correct
 * b) It's an Electrical Cliche.
 * c) Voltage is a measure of Electric Potential difference between two electrical points.
 * d) The other point could be Negative or positive.

3) What is the current through R1, R2, R3, and R4 in the figure shown?
 * a) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * b) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..
 * c) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * d) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.

4) A battery with a terminal voltage of 14.1 V is connected to a circuit consisting of 2 20.3 &Omega; resistors and one 13.1 &Omega; resistor. What is the voltage drop across the 13.1 &Omega; resistor?


 * a) 2.843E+00 V
 * b) 3.127E+00 V
 * c) 3.440E+00 V
 * d) 3.784E+00 V
 * e) 4.162E+00 V

5) A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?


 * a) 4.06 x 10-2 W
 * b) 4.92 x 10-2 W
 * c) 5.96 x 10-2 W
 * d) 7.22 x 10-2 W
 * e) 8.75 x 10-2 W

6) In the circuit shown V=18.8 V, R1=2.59 &Omega;, R2=5.47 &Omega;, and R3=15.8 &Omega;. What is the power dissipated by R2?


 * a) 2.191E+01 W
 * b) 2.410E+01 W
 * c) 2.651E+01 W
 * d) 2.916E+01 W
 * e) 3.208E+01 W

7) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * a) 9.9 ohms.
 * b) 11.4 ohms.
 * c) 13.1 ohms.
 * d) 15.1 ohms.
 * e) 17.3 ohms.

8) A make-believe metal has a density of 2.670E+03 kg/m3 and an atomic mass of 40.9 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 3.930E+28 e&minus;/m3
 * b) 4.323E+28 e&minus;/m3
 * c) 4.755E+28 e&minus;/m3
 * d) 5.231E+28 e&minus;/m3
 * e) 5.754E+28 e&minus;/m3

9) An ideal 6.4 volt battery is connected to a 0.071 ohm resistor.  To measure the current an ammeter with a resistance of 21$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 60.5 A.
 * b) 69.6 A.
 * c) 80 A.
 * d) 92 A.
 * e) 105.8 A.

10) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * a) 7.74 x 102 &Omega;
 * b) 9.38 x 102 &Omega;
 * c) 1.14 x 103 &Omega;
 * d) 1.38 x 103 &Omega;
 * e) 1.67 x 103 &Omega;

T4 K0
1) What is the average current involved when a truck battery sets in motion 546 C of charge in 3.7 s while starting an engine?


 * a) 1.220E+02 A
 * b) 1.342E+02 A
 * c) 1.476E+02 A
 * d) 1.623E+02 A
 * e) 1.786E+02 A

2) Calculate the electric field in a 12-gauge copper wire that is 17 m long and carries a current of 56 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 1.941E-04 V/m
 * b) 2.135E-04 V/m
 * c) 2.349E-04 V/m
 * d) 2.584E-04 V/m
 * e) 2.842E-04 V/m

3) In the circuit shown V=18.8 V, R1=2.59 &Omega;, R2=5.47 &Omega;, and R3=15.8 &Omega;. What is the power dissipated by R2?


 * a) 2.191E+01 W
 * b) 2.410E+01 W
 * c) 2.651E+01 W
 * d) 2.916E+01 W
 * e) 3.208E+01 W

4) The resistances in the figure shown are R1= 2.54 &Omega;, R2= 1.15 &Omega;, and R2= 2.9 &Omega;. V1 and V3 are text 0.446 V and 3.39 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.744 V. What is the absolute value of the current through R1?


 * a) 1.285E-01 A
 * b) 1.414E-01 A
 * c) 1.555E-01 A
 * d) 1.711E-01 A
 * e) 1.882E-01 A

5) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.24 x 10-5m/s
 * b) 2.72 x 10-5m/s
 * c) 3.29 x 10-5m/s
 * d) 3.99 x 10-5m/s
 * e) 4.83 x 10-5m/s

6) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * a) 7.85 x 10-3 W
 * b) 9.51 x 10-3 W
 * c) 1.15 x 10-2 W
 * d) 1.4 x 10-2 W
 * e) 1.69 x 10-2 W

7) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{7}\Omega$$.
 * b) $$\frac{7}{10}\Omega$$.
 * c) $$\frac{10}{6}\Omega$$.
 * d) $$\frac{6}{10}\Omega$$.

8) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * a) 0.5V.
 * b) 10V.
 * c) 15V.
 * d) 2V.

9) A battery has an emf of 6.7 volts, and an internal resistance of 348 $$k\Omega$$. It is connected to a 3.8 $$M\Omega$$ resistor.  What power is developed in the 3.8  $$M\Omega$$ resistor?


 * a) 9.91 $$\mu$$W.
 * b) 11.4 $$\mu$$W.
 * c) 13.11 $$\mu$$W.
 * d) 15.08 $$\mu$$W.
 * e) 17.34 $$\mu$$W.

10) Two 7 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.8 ohm resistor.  What is the net resistance?


 * a) 5.5 ohms.
 * b) 6.3 ohms.
 * c) 7.2 ohms.
 * d) 8.3 ohms.
 * e) 9.6 ohms.

T4 K1
1) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.07 x 10-5m/s
 * b) 3.72 x 10-5m/s
 * c) 4.5 x 10-5m/s
 * d) 5.46 x 10-5m/s
 * e) 6.61 x 10-5m/s

2) Calculate the electric field in a 12-gauge copper wire that is 41 m long and carries a current of 71 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.604E-04 V/m
 * b) 3.964E-04 V/m
 * c) 4.360E-04 V/m
 * d) 4.796E-04 V/m
 * e) 5.276E-04 V/m

3) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * a) 10V.
 * b) 2V.
 * c) 15V.
 * d) 0.5V.

4) In the circuit shown V=18.8 V, R1=2.59 &Omega;, R2=5.47 &Omega;, and R3=15.8 &Omega;. What is the power dissipated by R2?


 * a) 2.191E+01 W
 * b) 2.410E+01 W
 * c) 2.651E+01 W
 * d) 2.916E+01 W
 * e) 3.208E+01 W

5) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * a) 6.5 ohms.
 * b) 7.5 ohms.
 * c) 8.6 ohms.
 * d) 9.9 ohms.
 * e) 11.4 ohms.

6) A battery has an emf of 5.6 volts, and an internal resistance of 295 $$k\Omega$$. It is connected to a 4.1 $$M\Omega$$ resistor.  What power is developed in the 4.1  $$M\Omega$$ resistor?


 * a) 3.81 $$\mu$$W.
 * b) 4.38 $$\mu$$W.
 * c) 5.03 $$\mu$$W.
 * d) 5.79 $$\mu$$W.
 * e) 6.66 $$\mu$$W.

7) A 5.8 volt battery moves 95 Coulombs of charge in 0.3 hours. What is the power?


 * a) 4.21 x 10-1 W
 * b) 5.1 x 10-1 W
 * c) 6.18 x 10-1 W
 * d) 7.49 x 10-1 W
 * e) 9.07 x 10-1 W

8) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{6}{10}\Omega$$.
 * b) $$\frac{7}{10}\Omega$$.
 * c) $$\frac{10}{7}\Omega$$.
 * d) $$\frac{10}{6}\Omega$$.

9) What is the average current involved when a truck battery sets in motion 775 C of charge in 2.9 s while starting an engine?


 * a) 2.209E+02 A
 * b) 2.429E+02 A
 * c) 2.672E+02 A
 * d) 2.940E+02 A
 * e) 3.234E+02 A

10) The resistances in the figure shown are R1= 2.49 &Omega;, R2= 1.72 &Omega;, and R2= 3.58 &Omega;. V1 and V3 are text 0.417 V and 1.83 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.53 V. What is the absolute value of the current through R1?


 * a) 8.220E-02 A
 * b) 9.042E-02 A
 * c) 9.946E-02 A
 * d) 1.094E-01 A
 * e) 1.203E-01 A

T4 K2
1) Calculate the electric field in a 12-gauge copper wire that is 41 m long and carries a current of 71 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.604E-04 V/m
 * b) 3.964E-04 V/m
 * c) 4.360E-04 V/m
 * d) 4.796E-04 V/m
 * e) 5.276E-04 V/m

2) In the circuit shown V=15.4 V, R1=2.77 &Omega;, R2=6.07 &Omega;, and R3=14.5 &Omega;. What is the power dissipated by R2?


 * a) 1.190E+01 W
 * b) 1.309E+01 W
 * c) 1.440E+01 W
 * d) 1.584E+01 W
 * e) 1.742E+01 W

3) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{6}\Omega$$.
 * b) $$\frac{7}{10}\Omega$$.
 * c) $$\frac{6}{10}\Omega$$.
 * d) $$\frac{10}{7}\Omega$$.

4) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * a) 10V.
 * b) 15V.
 * c) 2V.
 * d) 0.5V.

5) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * a) 2.61 x 10-2 W
 * b) 3.16 x 10-2 W
 * c) 3.83 x 10-2 W
 * d) 4.64 x 10-2 W
 * e) 5.62 x 10-2 W

6) What is the average current involved when a truck battery sets in motion 889 C of charge in 3.64 s while starting an engine?


 * a) 2.442E+02 A
 * b) 2.687E+02 A
 * c) 2.955E+02 A
 * d) 3.251E+02 A
 * e) 3.576E+02 A

7) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.24 x 10-5m/s
 * b) 2.72 x 10-5m/s
 * c) 3.29 x 10-5m/s
 * d) 3.99 x 10-5m/s
 * e) 4.83 x 10-5m/s

8) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * a) 3.1 ohms.
 * b) 3.6 ohms.
 * c) 4.2 ohms.
 * d) 4.8 ohms.
 * e) 5.5 ohms.

9) A battery has an emf of 6.5 volts, and an internal resistance of 446 $$k\Omega$$. It is connected to a 3.5 $$M\Omega$$ resistor.  What power is developed in the 3.5  $$M\Omega$$ resistor?


 * a) 8.26 $$\mu$$W.
 * b) 9.5 $$\mu$$W.
 * c) 10.92 $$\mu$$W.
 * d) 12.56 $$\mu$$W.
 * e) 14.44 $$\mu$$W.

10) The resistances in the figure shown are R1= 1.54 &Omega;, R2= 0.927 &Omega;, and R2= 2.46 &Omega;. V1 and V3 are text 0.632 V and 2.12 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.586 V. What is the absolute value of the current through R1?


 * a) 1.770E-01 A
 * b) 1.947E-01 A
 * c) 2.141E-01 A
 * d) 2.355E-01 A
 * e) 2.591E-01 A

T4 L0
1) What is the average current involved when a truck battery sets in motion 701 C of charge in 4.98 s while starting an engine?


 * a) 1.280E+02 A
 * b) 1.408E+02 A
 * c) 1.548E+02 A
 * d) 1.703E+02 A
 * e) 1.874E+02 A

2) Calculate the drift speed of electrons in a copper wire with a diameter of 3.33 mm carrying a 13.8 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * a) 8.910E-05 m/s
 * b) 9.801E-05 m/s
 * c) 1.078E-04 m/s
 * d) 1.186E-04 m/s
 * e) 1.305E-04 m/s

3) Two sources of emf &epsilon;1=43.7 V, and  &epsilon;2=13.1 V are oriented as shownin the circuit. The resistances are R1=5.21 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.86 mA and I4=0.9 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 2.691E+00 mA
 * b) 2.960E+00 mA
 * c) 3.256E+00 mA
 * d) 3.582E+00 mA
 * e) 3.940E+00 mA

4) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.788E+01 W
 * b) 1.967E+01 W
 * c) 2.163E+01 W
 * d) 2.380E+01 W
 * e) 2.617E+01 W

5) The diameter of a copper wire is 1.9 mm, and it carries a current of 33 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 5.93 x 10-4m/s
 * b) 7.19 x 10-4m/s
 * c) 8.71 x 10-4m/s
 * d) 1.06 x 10-3m/s
 * e) 1.28 x 10-3m/s

6) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * a) 7.74 x 102 &Omega;
 * b) 9.38 x 102 &Omega;
 * c) 1.14 x 103 &Omega;
 * d) 1.38 x 103 &Omega;
 * e) 1.67 x 103 &Omega;

7) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * a) 15V.
 * b) 10V.
 * c) 2V.
 * d) 0.5V.

8) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) Voltage is a measure of Electric Potential difference between two electrical points.
 * b) None these are correct
 * c) The other point could be Negative or positive.
 * d) It's an Electrical Cliche.

9) An ideal 6.8 volt battery is connected to a 0.096 ohm resistor.  To measure the current an ammeter with a resistance of 29$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 35.8 A.
 * b) 41.1 A.
 * c) 47.3 A.
 * d) 54.4 A.
 * e) 62.6 A.

10) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * a) 9.9 ohms.
 * b) 11.4 ohms.
 * c) 13.1 ohms.
 * d) 15.1 ohms.
 * e) 17.3 ohms.

T4 L1
1) An ideal 5.7 volt battery is connected to a 0.091 ohm resistor.  To measure the current an ammeter with a resistance of 23$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 50 A.
 * b) 57.5 A.
 * c) 66.1 A.
 * d) 76 A.
 * e) 87.5 A.

2) The diameter of a copper wire is 1.9 mm, and it carries a current of 33 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 5.93 x 10-4m/s
 * b) 7.19 x 10-4m/s
 * c) 8.71 x 10-4m/s
 * d) 1.06 x 10-3m/s
 * e) 1.28 x 10-3m/s

3) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * a) 3.1 ohms.
 * b) 3.6 ohms.
 * c) 4.2 ohms.
 * d) 4.8 ohms.
 * e) 5.5 ohms.

4) What is the average current involved when a truck battery sets in motion 537 C of charge in 5.08 s while starting an engine?


 * a) 8.736E+01 A
 * b) 9.610E+01 A
 * c) 1.057E+02 A
 * d) 1.163E+02 A
 * e) 1.279E+02 A

5) Three resistors, R1 = 0.686 &Omega;, and R2 = R2 = 1.58 &Omega;, are connected in parallel to a 8.97 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.173E+02 W
 * b) 1.290E+02 W
 * c) 1.419E+02 W
 * d) 1.561E+02 W
 * e) 1.717E+02 W

6) Two sources of emf &epsilon;1=38.9 V, and  &epsilon;2=15.7 V are oriented as shownin the circuit. The resistances are R1=2.24 k&Omega; and  R2=2.23 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.01 mA and I4=0.86 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.955E+00 mA
 * b) 2.150E+00 mA
 * c) 2.365E+00 mA
 * d) 2.601E+00 mA
 * e) 2.862E+00 mA

7) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * a) 2V.
 * b) 15V.
 * c) 10V.
 * d) 0.5V.

8) A 196 Watt DC motor draws 0.35 amps of current. What is effective resistance?


 * a) 1.6 x 103 &Omega;
 * b) 1.94 x 103 &Omega;
 * c) 2.35 x 103 &Omega;
 * d) 2.85 x 103 &Omega;
 * e) 3.45 x 103 &Omega;

9) Calculate the drift speed of electrons in a copper wire with a diameter of 5.33 mm carrying a 5.1 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * a) 1.711E-05 m/s
 * b) 1.882E-05 m/s
 * c) 2.070E-05 m/s
 * d) 2.277E-05 m/s
 * e) 2.505E-05 m/s

10) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) None these are correct
 * b) The other point could be Negative or positive.
 * c) It's an Electrical Cliche.
 * d) Voltage is a measure of Electric Potential difference between two electrical points.

T4 L2
1) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.788E+01 W
 * b) 1.967E+01 W
 * c) 2.163E+01 W
 * d) 2.380E+01 W
 * e) 2.617E+01 W

2) Two sources of emf &epsilon;1=24.9 V, and  &epsilon;2=10.1 V are oriented as shownin the circuit. The resistances are R1=2.32 k&Omega; and  R2=2.31 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.74 mA and I4=0.444 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.725E+00 mA
 * b) 1.898E+00 mA
 * c) 2.087E+00 mA
 * d) 2.296E+00 mA
 * e) 2.526E+00 mA

3) The diameter of a copper wire is 9.2 mm, and it carries a current of 64 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 4.91 x 10-5m/s
 * b) 5.95 x 10-5m/s
 * c) 7.2 x 10-5m/s
 * d) 8.73 x 10-5m/s
 * e) 1.06 x 10-4m/s

4) An ideal 7.8 volt battery is connected to a 0.064 ohm resistor.  To measure the current an ammeter with a resistance of 17$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 63.3 A.
 * b) 72.8 A.
 * c) 83.7 A.
 * d) 96.3 A.
 * e) 110.7 A.

5) What is the average current involved when a truck battery sets in motion 618 C of charge in 2.28 s while starting an engine?


 * a) 2.240E+02 A
 * b) 2.464E+02 A
 * c) 2.711E+02 A
 * d) 2.982E+02 A
 * e) 3.280E+02 A

6) Two 6.6 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * a) 4.4 ohms.
 * b) 5.1 ohms.
 * c) 5.8 ohms.
 * d) 6.7 ohms.
 * e) 7.7 ohms.

7) A 104 Watt DC motor draws 0.13 amps of current. What is effective resistance?


 * a) 3.46 x 103 &Omega;
 * b) 4.19 x 103 &Omega;
 * c) 5.08 x 103 &Omega;
 * d) 6.15 x 103 &Omega;
 * e) 7.46 x 103 &Omega;

8) Calculate the drift speed of electrons in a copper wire with a diameter of 3.33 mm carrying a 13.8 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * a) 8.910E-05 m/s
 * b) 9.801E-05 m/s
 * c) 1.078E-04 m/s
 * d) 1.186E-04 m/s
 * e) 1.305E-04 m/s

9) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * a) 0.5V.
 * b) 10V.
 * c) 15V.
 * d) 2V.

10) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) None these are correct
 * b) It's an Electrical Cliche.
 * c) The other point could be Negative or positive.
 * d) Voltage is a measure of Electric Potential difference between two electrical points.

T4 M0
1) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=52 C  and $$\tau=$$0.018 s. What is the current at $$t=$$0.0207 s?


 * a) 6.872E+02 A
 * b) 7.560E+02 A
 * c) 8.316E+02 A
 * d) 9.147E+02 A
 * e) 1.006E+03 A

2) What is consumer cost to operate one 77&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.124 per kilowatt-hour?


 * a) $3.142E+01
 * b) $3.456E+01
 * c) $3.802E+01
 * d) $4.182E+01
 * e) $4.600E+01

3) In the circuit shown V=15.2 V, R1=1.6 &Omega;, R2=7.89 &Omega;, and R3=15.3 &Omega;. What is the power dissipated by R2?


 * a) 1.713E+01 W
 * b) 1.885E+01 W
 * c) 2.073E+01 W
 * d) 2.280E+01 W
 * e) 2.508E+01 W

4) Three resistors, R1 = 1.52 &Omega;, and R2 = R2 = 3.38 &Omega;, are connected in parallel to a 5.82 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.842E+01 W
 * b) 2.026E+01 W
 * c) 2.228E+01 W
 * d) 2.451E+01 W
 * e) 2.696E+01 W

5) A power supply delivers 169 watts of power to a 219 ohm resistor.  What was the applied voltage?


 * a) 8.93 x 101 volts
 * b) 1.08 x 102 volts
 * c) 1.31 x 102 volts
 * d) 1.59 x 102 volts
 * e) 1.92 x 102 volts

6) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.24 x 10-5m/s
 * b) 2.72 x 10-5m/s
 * c) 3.29 x 10-5m/s
 * d) 3.99 x 10-5m/s
 * e) 4.83 x 10-5m/s

7) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) None of these are true.
 * b) $$3.5\Omega.$$
 * c) $$2.5\Omega.$$
 * d) $$4.5\Omega.$$

8) What is the current through R1 and R2 in the figure shown?
 * a) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * b) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * c) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * d) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.

9) An ideal 5.9 volt battery is connected to a 0.059 ohm resistor.  To measure the current an ammeter with a resistance of 24$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 71.1 A.
 * b) 81.7 A.
 * c) 94 A.
 * d) 108.1 A.
 * e) 124.3 A.

10) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.1 ohms.
 * b) 7 ohms.
 * c) 8.1 ohms.
 * d) 9.3 ohms.
 * e) 10.7 ohms.

T4 M1
1) In the circuit shown V=15.2 V, R1=1.6 &Omega;, R2=7.89 &Omega;, and R3=15.3 &Omega;. What is the power dissipated by R2?


 * a) 1.713E+01 W
 * b) 1.885E+01 W
 * c) 2.073E+01 W
 * d) 2.280E+01 W
 * e) 2.508E+01 W

2) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=78 C  and $$\tau=$$0.0244 s. What is the current at $$t=$$0.0225 s?


 * a) 1.271E+03 A
 * b) 1.398E+03 A
 * c) 1.538E+03 A
 * d) 1.692E+03 A
 * e) 1.861E+03 A

3) An ideal 7.5 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 19$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 54.3 A.
 * b) 62.4 A.
 * c) 71.8 A.
 * d) 82.6 A.
 * e) 94.9 A.

4) Three resistors, R1 = 1.31 &Omega;, and R2 = R2 = 2.91 &Omega;, are connected in parallel to a 6.03 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 2.294E+01 W
 * b) 2.523E+01 W
 * c) 2.776E+01 W
 * d) 3.053E+01 W
 * e) 3.359E+01 W

5) What is consumer cost to operate one 89&minus;W incandescent bulb for 10 hours per day for 1 year (365 days) if the cost of electricity is $0.141 per kilowatt-hour?


 * a) $3.785E+01
 * b) $4.164E+01
 * c) $4.580E+01
 * d) $5.038E+01
 * e) $5.542E+01

6) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$3.5\Omega.$$
 * b) $$2.5\Omega.$$
 * c) None of these are true.
 * d) $$4.5\Omega.$$

7) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * a) 8.42 x 101 volts
 * b) 1.02 x 102 volts
 * c) 1.24 x 102 volts
 * d) 1.5 x 102 volts
 * e) 1.81 x 102 volts

8) What is the current through R1 and R2 in the figure shown?
 * a) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * b) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * c) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * d) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.

9) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 6.77 x 10-5m/s
 * b) 8.2 x 10-5m/s
 * c) 9.93 x 10-5m/s
 * d) 1.2 x 10-4m/s
 * e) 1.46 x 10-4m/s

10) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.1 ohms.
 * b) 7 ohms.
 * c) 8.1 ohms.
 * d) 9.3 ohms.
 * e) 10.7 ohms.

T4 M2
1) What is the current through R1 and R2 in the figure shown?
 * a) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * b) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * c) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * d) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.

2) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=30 C  and $$\tau=$$0.0178 s. What is the current at $$t=$$0.0161 s?


 * a) 5.125E+02 A
 * b) 5.638E+02 A
 * c) 6.201E+02 A
 * d) 6.822E+02 A
 * e) 7.504E+02 A

3) A 5.8 ohm resistor is connected in series to a pair of 2.8 ohm resistors that are in parallel.  What is the net resistance?


 * a) 7.2 ohms.
 * b) 8.3 ohms.
 * c) 9.5 ohms.
 * d) 11 ohms.
 * e) 12.6 ohms.

4) What is consumer cost to operate one 56&minus;W incandescent bulb for 6 hours per day for 1 year (365 days) if the cost of electricity is $0.13 per kilowatt-hour?


 * a) $1.198E+01
 * b) $1.318E+01
 * c) $1.449E+01
 * d) $1.594E+01
 * e) $1.754E+01

5) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.82 x 10-4m/s
 * b) 4.63 x 10-4m/s
 * c) 5.61 x 10-4m/s
 * d) 6.8 x 10-4m/s
 * e) 8.24 x 10-4m/s

6) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) None of these are true.
 * b) $$4.5\Omega.$$
 * c) $$3.5\Omega.$$
 * d) $$2.5\Omega.$$

7) In the circuit shown V=16.2 V, R1=2.84 &Omega;, R2=7.06 &Omega;, and R3=13.1 &Omega;. What is the power dissipated by R2?


 * a) 1.418E+01 W
 * b) 1.560E+01 W
 * c) 1.716E+01 W
 * d) 1.887E+01 W
 * e) 2.076E+01 W

8) A power supply delivers 101 watts of power to a 219 ohm resistor.  What was the applied voltage?


 * a) 1.49 x 102 volts
 * b) 1.8 x 102 volts
 * c) 2.18 x 102 volts
 * d) 2.64 x 102 volts
 * e) 3.2 x 102 volts

9) An ideal 7.3 volt battery is connected to a 0.071 ohm resistor.  To measure the current an ammeter with a resistance of 27$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 49 A.
 * b) 56.3 A.
 * c) 64.8 A.
 * d) 74.5 A.
 * e) 85.7 A.

10) Three resistors, R1 = 0.672 &Omega;, and R2 = R2 = 1.52 &Omega;, are connected in parallel to a 5.34 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 2.898E+01 W
 * b) 3.188E+01 W
 * c) 3.507E+01 W
 * d) 3.858E+01 W
 * e) 4.243E+01 W

T4 N0
1) Calculate the electric field in a 12-gauge copper wire that is 84 m long and carries a current of 48 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 1.664E-04 V/m
 * b) 1.830E-04 V/m
 * c) 2.013E-04 V/m
 * d) 2.215E-04 V/m
 * e) 2.436E-04 V/m

2) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=63 C  and $$\tau=$$0.0149 s. What is the current at $$t=$$0.0172 s?


 * a) 1.212E+03 A
 * b) 1.333E+03 A
 * c) 1.466E+03 A
 * d) 1.613E+03 A
 * e) 1.774E+03 A

3) Two sources of emf &epsilon;1=16.8 V, and  &epsilon;2=7.15 V are oriented as shownin the circuit. The resistances are R1=3.12 k&Omega; and  R2=1.51 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.95 mA and I4=0.603 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 4.108E+00 V
 * b) 4.519E+00 V
 * c) 4.970E+00 V
 * d) 5.468E+00 V
 * e) 6.014E+00 V

4) Three resistors, R1 = 0.87 &Omega;, and R2 = R2 = 2.0 &Omega;, are connected in parallel to a 8.57 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 6.977E+01 W
 * b) 7.674E+01 W
 * c) 8.442E+01 W
 * d) 9.286E+01 W
 * e) 1.021E+02 W

5) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.07 x 10-5m/s
 * b) 3.72 x 10-5m/s
 * c) 4.5 x 10-5m/s
 * d) 5.46 x 10-5m/s
 * e) 6.61 x 10-5m/s

6) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * a) 2.61 x 10-2 W
 * b) 3.16 x 10-2 W
 * c) 3.83 x 10-2 W
 * d) 4.64 x 10-2 W
 * e) 5.62 x 10-2 W

7) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) The other point could be Negative or positive.
 * b) It's an Electrical Cliche.
 * c) None these are correct
 * d) Voltage is a measure of Electric Potential difference between two electrical points.

8) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * a) None of these are true.
 * b) $$R_{Total} = 6\Omega$$.
 * c) $$R_{Total} = 3\Omega$$.
 * d) $$R_{Total} = 0.5454\Omega$$.

9) A 8 ohm resistor is connected in series to a pair of 5.6 ohm resistors that are in parallel.  What is the net resistance?


 * a) 7.1 ohms.
 * b) 8.2 ohms.
 * c) 9.4 ohms.
 * d) 10.8 ohms.
 * e) 12.4 ohms.

10) An ideal 7.5 volt battery is connected to a 0.084 ohm resistor.  To measure the current an ammeter with a resistance of 14$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 43.8 A.
 * b) 50.3 A.
 * c) 57.9 A.
 * d) 66.5 A.
 * e) 76.5 A.

T4 N1
1) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.788E+01 W
 * b) 1.967E+01 W
 * c) 2.163E+01 W
 * d) 2.380E+01 W
 * e) 2.617E+01 W

2) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=11.5 V are oriented as shownin the circuit. The resistances are R1=2.13 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.11 mA and I4=0.746 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 4.275E+00 V
 * b) 4.703E+00 V
 * c) 5.173E+00 V
 * d) 5.691E+00 V
 * e) 6.260E+00 V

3) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=85 C  and $$\tau=$$0.021 s. What is the current at $$t=$$0.0128 s?


 * a) 1.503E+03 A
 * b) 1.653E+03 A
 * c) 1.818E+03 A
 * d) 2.000E+03 A
 * e) 2.200E+03 A

4) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * a) 7.85 x 10-3 W
 * b) 9.51 x 10-3 W
 * c) 1.15 x 10-2 W
 * d) 1.4 x 10-2 W
 * e) 1.69 x 10-2 W

5) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 6.77 x 10-5m/s
 * b) 8.2 x 10-5m/s
 * c) 9.93 x 10-5m/s
 * d) 1.2 x 10-4m/s
 * e) 1.46 x 10-4m/s

6) An ideal 6.8 volt battery is connected to a 0.096 ohm resistor.  To measure the current an ammeter with a resistance of 29$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 35.8 A.
 * b) 41.1 A.
 * c) 47.3 A.
 * d) 54.4 A.
 * e) 62.6 A.

7) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) The other point could be Negative or positive.
 * b) It's an Electrical Cliche.
 * c) Voltage is a measure of Electric Potential difference between two electrical points.
 * d) None these are correct

8) Calculate the electric field in a 12-gauge copper wire that is 17 m long and carries a current of 56 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 1.941E-04 V/m
 * b) 2.135E-04 V/m
 * c) 2.349E-04 V/m
 * d) 2.584E-04 V/m
 * e) 2.842E-04 V/m

9) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * a) $$R_{Total} = 0.5454\Omega$$.
 * b) $$R_{Total} = 6\Omega$$.
 * c) None of these are true.
 * d) $$R_{Total} = 3\Omega$$.

10) A 6.3 ohm resistor is connected in series to a pair of 3.4 ohm resistors that are in parallel.  What is the net resistance?


 * a) 5.3 ohms.
 * b) 6 ohms.
 * c) 7 ohms.
 * d) 8 ohms.
 * e) 9.2 ohms.

T4 N2
1) Three resistors, R1 = 0.87 &Omega;, and R2 = R2 = 2.0 &Omega;, are connected in parallel to a 8.57 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 6.977E+01 W
 * b) 7.674E+01 W
 * c) 8.442E+01 W
 * d) 9.286E+01 W
 * e) 1.021E+02 W

2) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.77 x 10-5m/s
 * b) 3.36 x 10-5m/s
 * c) 4.06 x 10-5m/s
 * d) 4.92 x 10-5m/s
 * e) 5.97 x 10-5m/s

3) Two sources of emf &epsilon;1=38.8 V, and  &epsilon;2=14.9 V are oriented as shownin the circuit. The resistances are R1=5.83 k&Omega; and  R2=1.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.57 mA and I4=1.19 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 1.013E+01 V
 * b) 1.115E+01 V
 * c) 1.226E+01 V
 * d) 1.349E+01 V
 * e) 1.484E+01 V

4) Calculate the electric field in a 12-gauge copper wire that is 13 m long and carries a current of 59 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 2.250E-04 V/m
 * b) 2.475E-04 V/m
 * c) 2.722E-04 V/m
 * d) 2.995E-04 V/m
 * e) 3.294E-04 V/m

5) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) Voltage is a measure of Electric Potential difference between two electrical points.
 * b) It's an Electrical Cliche.
 * c) The other point could be Negative or positive.
 * d) None these are correct

6) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * a) None of these are true.
 * b) $$R_{Total} = 3\Omega$$.
 * c) $$R_{Total} = 6\Omega$$.
 * d) $$R_{Total} = 0.5454\Omega$$.

7) An ideal 5.7 volt battery is connected to a 0.091 ohm resistor.  To measure the current an ammeter with a resistance of 23$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 50 A.
 * b) 57.5 A.
 * c) 66.1 A.
 * d) 76 A.
 * e) 87.5 A.

8) A 5.6 ohm resistor is connected in series to a pair of 7.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 7 ohms.
 * b) 8 ohms.
 * c) 9.2 ohms.
 * d) 10.6 ohms.
 * e) 12.2 ohms.

9) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * a) 7.85 x 10-3 W
 * b) 9.51 x 10-3 W
 * c) 1.15 x 10-2 W
 * d) 1.4 x 10-2 W
 * e) 1.69 x 10-2 W

10) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=97 C  and $$\tau=$$0.0132 s. What is the current at $$t=$$0.0225 s?


 * a) 1.336E+03 A
 * b) 1.470E+03 A
 * c) 1.617E+03 A
 * d) 1.779E+03 A
 * e) 1.957E+03 A

T4 O0
1) A DC winch moter draws 25 amps at 119 volts as it lifts a 4.730E+03 N weight at a constant speed of 0.47 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 1.094E+00 &Omega;
 * b) 1.203E+00 &Omega;
 * c) 1.323E+00 &Omega;
 * d) 1.456E+00 &Omega;
 * e) 1.601E+00 &Omega;

2) What is consumer cost to operate one 77&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.124 per kilowatt-hour?


 * a) $3.142E+01
 * b) $3.456E+01
 * c) $3.802E+01
 * d) $4.182E+01
 * e) $4.600E+01

3) A battery with a terminal voltage of 10.7 V is connected to a circuit consisting of 2 24.5 &Omega; resistors and one 15.2 &Omega; resistor. What is the voltage drop across the 15.2 &Omega; resistor?


 * a) 1.730E+00 V
 * b) 1.903E+00 V
 * c) 2.094E+00 V
 * d) 2.303E+00 V
 * e) 2.533E+00 V

4) Three resistors, R1 = 0.855 &Omega;, and R2 = R2 = 1.91 &Omega;, are connected in parallel to a 6.97 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 5.682E+01 W
 * b) 6.250E+01 W
 * c) 6.875E+01 W
 * d) 7.563E+01 W
 * e) 8.319E+01 W

5) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * a) 4.14 x 10-2 W
 * b) 5.02 x 10-2 W
 * c) 6.08 x 10-2 W
 * d) 7.37 x 10-2 W
 * e) 8.93 x 10-2 W

6) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * a) 5.42 x 102 &Omega;
 * b) 6.57 x 102 &Omega;
 * c) 7.95 x 102 &Omega;
 * d) 9.64 x 102 &Omega;
 * e) 1.17 x 103 &Omega;

7) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * a) 2A
 * b) 12A
 * c) 3A
 * d) 1.5A

8) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$4.5\Omega.$$
 * b) $$3.5\Omega.$$
 * c) $$2.5\Omega.$$
 * d) None of these are true.

9) A 5.7 ohm resistor is connected in series to a pair of 3.8 ohm resistors that are in parallel.  What is the net resistance?


 * a) 5 ohms.
 * b) 5.7 ohms.
 * c) 6.6 ohms.
 * d) 7.6 ohms.
 * e) 8.7 ohms.

10) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.6 ohm resistor.  What is the net resistance?


 * a) 3.7 ohms.
 * b) 4.3 ohms.
 * c) 5 ohms.
 * d) 5.7 ohms.
 * e) 6.6 ohms.

T4 O1
1) A battery with a terminal voltage of 8.66 V is connected to a circuit consisting of 3 19.6 &Omega; resistors and one 10.6 &Omega; resistor. What is the voltage drop across the 10.6 &Omega; resistor?


 * a) 1.202E+00 V
 * b) 1.323E+00 V
 * c) 1.455E+00 V
 * d) 1.600E+00 V
 * e) 1.761E+00 V

2) A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?


 * a) 4.06 x 10-2 W
 * b) 4.92 x 10-2 W
 * c) 5.96 x 10-2 W
 * d) 7.22 x 10-2 W
 * e) 8.75 x 10-2 W

3) Three resistors, R1 = 0.624 &Omega;, and R2 = R2 = 1.37 &Omega;, are connected in parallel to a 7.46 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 7.371E+01 W
 * b) 8.108E+01 W
 * c) 8.919E+01 W
 * d) 9.810E+01 W
 * e) 1.079E+02 W

4) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * a) 2.2 x 103 &Omega;
 * b) 2.67 x 103 &Omega;
 * c) 3.23 x 103 &Omega;
 * d) 3.91 x 103 &Omega;
 * e) 4.74 x 103 &Omega;

5) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * a) 12A
 * b) 1.5A
 * c) 3A
 * d) 2A

6) A DC winch moter draws 25 amps at 119 volts as it lifts a 4.730E+03 N weight at a constant speed of 0.47 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 1.094E+00 &Omega;
 * b) 1.203E+00 &Omega;
 * c) 1.323E+00 &Omega;
 * d) 1.456E+00 &Omega;
 * e) 1.601E+00 &Omega;

7) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * a) 6.5 ohms.
 * b) 7.5 ohms.
 * c) 8.6 ohms.
 * d) 9.9 ohms.
 * e) 11.4 ohms.

8) What is consumer cost to operate one 57&minus;W incandescent bulb for 11 hours per day for 1 year (365 days) if the cost of electricity is $0.146 per kilowatt-hour?


 * a) $2.282E+01
 * b) $2.510E+01
 * c) $2.761E+01
 * d) $3.038E+01
 * e) $3.341E+01

9) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$3.5\Omega.$$
 * b) $$4.5\Omega.$$
 * c) None of these are true.
 * d) $$2.5\Omega.$$

10) A 5.6 ohm resistor is connected in series to a pair of 7.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 7 ohms.
 * b) 8 ohms.
 * c) 9.2 ohms.
 * d) 10.6 ohms.
 * e) 12.2 ohms.

T4 O2
1) A battery with a terminal voltage of 13.2 V is connected to a circuit consisting of 3 15.7 &Omega; resistors and one 10.3 &Omega; resistor. What is the voltage drop across the 10.3 &Omega; resistor?


 * a) 1.958E+00 V
 * b) 2.153E+00 V
 * c) 2.369E+00 V
 * d) 2.606E+00 V
 * e) 2.866E+00 V

2) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * a) 2.28 x 103 &Omega;
 * b) 2.76 x 103 &Omega;
 * c) 3.34 x 103 &Omega;
 * d) 4.05 x 103 &Omega;
 * e) 4.91 x 103 &Omega;

3) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * a) 4.14 x 10-2 W
 * b) 5.02 x 10-2 W
 * c) 6.08 x 10-2 W
 * d) 7.37 x 10-2 W
 * e) 8.93 x 10-2 W

4) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * a) 1.5A
 * b) 12A
 * c) 3A
 * d) 2A

5) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$3.5\Omega.$$
 * b) None of these are true.
 * c) $$2.5\Omega.$$
 * d) $$4.5\Omega.$$

6) Three resistors, R1 = 0.624 &Omega;, and R2 = R2 = 1.37 &Omega;, are connected in parallel to a 7.46 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 7.371E+01 W
 * b) 8.108E+01 W
 * c) 8.919E+01 W
 * d) 9.810E+01 W
 * e) 1.079E+02 W

7) Two 9.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * a) 5.4 ohms.
 * b) 6.2 ohms.
 * c) 7.1 ohms.
 * d) 8.2 ohms.
 * e) 9.4 ohms.

8) What is consumer cost to operate one 102&minus;W incandescent bulb for 5 hours per day for 1 year (365 days) if the cost of electricity is $0.149 per kilowatt-hour?


 * a) $2.292E+01
 * b) $2.521E+01
 * c) $2.774E+01
 * d) $3.051E+01
 * e) $3.356E+01

9) A DC winch moter draws 20 amps at 157 volts as it lifts a 5.270E+03 N weight at a constant speed of 0.403 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 2.540E+00 &Omega;
 * b) 2.795E+00 &Omega;
 * c) 3.074E+00 &Omega;
 * d) 3.381E+00 &Omega;
 * e) 3.720E+00 &Omega;

10) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * a) 8.3 ohms.
 * b) 9.6 ohms.
 * c) 11 ohms.
 * d) 12.7 ohms.
 * e) 14.5 ohms.

T4 P0
1) Calculate the electric field in a 12-gauge copper wire that is 62 m long and carries a current of 52 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 1.983E-04 V/m
 * b) 2.181E-04 V/m
 * c) 2.399E-04 V/m
 * d) 2.639E-04 V/m
 * e) 2.903E-04 V/m

2) A DC winch moter draws 23 amps at 170 volts as it lifts a 5.200E+03 N weight at a constant speed of 0.662 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 7.305E-01 &Omega;
 * b) 8.036E-01 &Omega;
 * c) 8.839E-01 &Omega;
 * d) 9.723E-01 &Omega;
 * e) 1.070E+00 &Omega;

3) Two sources of emf &epsilon;1=27.1 V, and  &epsilon;2=8.04 V are oriented as shownin the circuit. The resistances are R1=2.94 k&Omega; and  R2=1.61 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.87 mA and I4=0.57 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 8.482E+00 V
 * b) 9.330E+00 V
 * c) 1.026E+01 V
 * d) 1.129E+01 V
 * e) 1.242E+01 V

4) A battery with a terminal voltage of 9.88 V is connected to a circuit consisting of 3 15.9 &Omega; resistors and one 10.8 &Omega; resistor. What is the voltage drop across the 10.8 &Omega; resistor?


 * a) 1.370E+00 V
 * b) 1.507E+00 V
 * c) 1.658E+00 V
 * d) 1.824E+00 V
 * e) 2.006E+00 V

5) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * a) 4.43 x 10-2 W
 * b) 5.37 x 10-2 W
 * c) 6.51 x 10-2 W
 * d) 7.88 x 10-2 W
 * e) 9.55 x 10-2 W

6) The diameter of a copper wire is 9.2 mm, and it carries a current of 64 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 4.91 x 10-5m/s
 * b) 5.95 x 10-5m/s
 * c) 7.2 x 10-5m/s
 * d) 8.73 x 10-5m/s
 * e) 1.06 x 10-4m/s

7) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) None of these are true.
 * b) $$3.5\Omega.$$
 * c) $$2.5\Omega.$$
 * d) $$4.5\Omega.$$

8) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * a) The voltage across both resistors is the same as the source.
 * b) None of these are true.
 * c) The voltage across both resistors is half the voltage of the source.
 * d) One has full voltage, the other has none.

9) A battery has an emf of 6.5 volts, and an internal resistance of 446 $$k\Omega$$. It is connected to a 3.5 $$M\Omega$$ resistor.  What power is developed in the 3.5  $$M\Omega$$ resistor?


 * a) 8.26 $$\mu$$W.
 * b) 9.5 $$\mu$$W.
 * c) 10.92 $$\mu$$W.
 * d) 12.56 $$\mu$$W.
 * e) 14.44 $$\mu$$W.

10) An ideal 6.4 volt battery is connected to a 0.071 ohm resistor.  To measure the current an ammeter with a resistance of 21$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 60.5 A.
 * b) 69.6 A.
 * c) 80 A.
 * d) 92 A.
 * e) 105.8 A.

T4 P1
1) Calculate the electric field in a 12-gauge copper wire that is 25 m long and carries a current of 43 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 2.182E-04 V/m
 * b) 2.401E-04 V/m
 * c) 2.641E-04 V/m
 * d) 2.905E-04 V/m
 * e) 3.195E-04 V/m

2) An ideal 7.3 volt battery is connected to a 0.071 ohm resistor.  To measure the current an ammeter with a resistance of 27$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 49 A.
 * b) 56.3 A.
 * c) 64.8 A.
 * d) 74.5 A.
 * e) 85.7 A.

3) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.07 x 10-5m/s
 * b) 3.72 x 10-5m/s
 * c) 4.5 x 10-5m/s
 * d) 5.46 x 10-5m/s
 * e) 6.61 x 10-5m/s

4) A DC winch moter draws 29 amps at 153 volts as it lifts a 4.780E+03 N weight at a constant speed of 0.691 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 1.226E+00 &Omega;
 * b) 1.348E+00 &Omega;
 * c) 1.483E+00 &Omega;
 * d) 1.632E+00 &Omega;
 * e) 1.795E+00 &Omega;

5) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * a) 2.61 x 10-2 W
 * b) 3.16 x 10-2 W
 * c) 3.83 x 10-2 W
 * d) 4.64 x 10-2 W
 * e) 5.62 x 10-2 W

6) A battery with a terminal voltage of 8.01 V is connected to a circuit consisting of 3 22.1 &Omega; resistors and one 14.5 &Omega; resistor. What is the voltage drop across the 14.5 &Omega; resistor?


 * a) 9.818E-01 V
 * b) 1.080E+00 V
 * c) 1.188E+00 V
 * d) 1.307E+00 V
 * e) 1.437E+00 V

7) A battery has an emf of 5.6 volts, and an internal resistance of 450 $$k\Omega$$. It is connected to a 2.7 $$M\Omega$$ resistor.  What power is developed in the 2.7  $$M\Omega$$ resistor?


 * a) 4.88 $$\mu$$W.
 * b) 5.61 $$\mu$$W.
 * c) 6.45 $$\mu$$W.
 * d) 7.42 $$\mu$$W.
 * e) 8.53 $$\mu$$W.

8) Two sources of emf &epsilon;1=27.1 V, and  &epsilon;2=8.04 V are oriented as shownin the circuit. The resistances are R1=2.94 k&Omega; and  R2=1.61 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.87 mA and I4=0.57 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 8.482E+00 V
 * b) 9.330E+00 V
 * c) 1.026E+01 V
 * d) 1.129E+01 V
 * e) 1.242E+01 V

9) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$3.5\Omega.$$
 * b) None of these are true.
 * c) $$4.5\Omega.$$
 * d) $$2.5\Omega.$$

10) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * a) The voltage across both resistors is half the voltage of the source.
 * b) None of these are true.
 * c) One has full voltage, the other has none.
 * d) The voltage across both resistors is the same as the source.

T4 P2
1) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * a) The voltage across both resistors is half the voltage of the source.
 * b) The voltage across both resistors is the same as the source.
 * c) None of these are true.
 * d) One has full voltage, the other has none.

2) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * a) 4.14 x 10-2 W
 * b) 5.02 x 10-2 W
 * c) 6.08 x 10-2 W
 * d) 7.37 x 10-2 W
 * e) 8.93 x 10-2 W

3) An ideal 5.9 volt battery is connected to a 0.059 ohm resistor.  To measure the current an ammeter with a resistance of 24$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 71.1 A.
 * b) 81.7 A.
 * c) 94 A.
 * d) 108.1 A.
 * e) 124.3 A.

4) A battery with a terminal voltage of 8.14 V is connected to a circuit consisting of 2 21.5 &Omega; resistors and one 13.1 &Omega; resistor. What is the voltage drop across the 13.1 &Omega; resistor?


 * a) 1.298E+00 V
 * b) 1.428E+00 V
 * c) 1.571E+00 V
 * d) 1.728E+00 V
 * e) 1.901E+00 V

5) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$3.5\Omega.$$
 * b) None of these are true.
 * c) $$4.5\Omega.$$
 * d) $$2.5\Omega.$$

6) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.82 x 10-4m/s
 * b) 4.63 x 10-4m/s
 * c) 5.61 x 10-4m/s
 * d) 6.8 x 10-4m/s
 * e) 8.24 x 10-4m/s

7) Two sources of emf &epsilon;1=52.7 V, and  &epsilon;2=17.5 V are oriented as shownin the circuit. The resistances are R1=5.86 k&Omega; and  R2=2.08 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.48 mA and I4=0.988 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 2.064E+01 V
 * b) 2.270E+01 V
 * c) 2.497E+01 V
 * d) 2.747E+01 V
 * e) 3.021E+01 V

8) A DC winch moter draws 18 amps at 126 volts as it lifts a 5.830E+03 N weight at a constant speed of 0.26 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 1.919E+00 &Omega;
 * b) 2.111E+00 &Omega;
 * c) 2.322E+00 &Omega;
 * d) 2.554E+00 &Omega;
 * e) 2.809E+00 &Omega;

9) A battery has an emf of 5.6 volts, and an internal resistance of 450 $$k\Omega$$. It is connected to a 2.7 $$M\Omega$$ resistor.  What power is developed in the 2.7  $$M\Omega$$ resistor?


 * a) 4.88 $$\mu$$W.
 * b) 5.61 $$\mu$$W.
 * c) 6.45 $$\mu$$W.
 * d) 7.42 $$\mu$$W.
 * e) 8.53 $$\mu$$W.

10) Calculate the electric field in a 12-gauge copper wire that is 56 m long and carries a current of 81 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 4.111E-04 V/m
 * b) 4.522E-04 V/m
 * c) 4.975E-04 V/m
 * d) 5.472E-04 V/m
 * e) 6.019E-04 V/m

T4 Q0
1) A DC winch moter draws 20 amps at 169 volts as it lifts a 5.120E+03 N weight at a constant speed of 0.543 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 1.500E+00 &Omega;
 * b) 1.650E+00 &Omega;
 * c) 1.815E+00 &Omega;
 * d) 1.996E+00 &Omega;
 * e) 2.196E+00 &Omega;

2) Calculate the electric field in a 12-gauge copper wire that is 15 m long and carries a current of 85 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 2.947E-04 V/m
 * b) 3.241E-04 V/m
 * c) 3.565E-04 V/m
 * d) 3.922E-04 V/m
 * e) 4.314E-04 V/m

3) Two sources of emf &epsilon;1=24.9 V, and  &epsilon;2=10.1 V are oriented as shownin the circuit. The resistances are R1=2.32 k&Omega; and  R2=2.31 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.74 mA and I4=0.444 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.725E+00 mA
 * b) 1.898E+00 mA
 * c) 2.087E+00 mA
 * d) 2.296E+00 mA
 * e) 2.526E+00 mA

4) Two sources of emf &epsilon;1=58.5 V, and  &epsilon;2=17.3 V are oriented as shownin the circuit. The resistances are R1=3.06 k&Omega; and  R2=1.88 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=5.25 mA and I4=1.25 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * a) 1.981E+01 V
 * b) 2.179E+01 V
 * c) 2.397E+01 V
 * d) 2.637E+01 V
 * e) 2.901E+01 V

5) A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?


 * a) 4.06 x 10-2 W
 * b) 4.92 x 10-2 W
 * c) 5.96 x 10-2 W
 * d) 7.22 x 10-2 W
 * e) 8.75 x 10-2 W

6) A power supply delivers 101 watts of power to a 219 ohm resistor.  What was the applied voltage?


 * a) 1.49 x 102 volts
 * b) 1.8 x 102 volts
 * c) 2.18 x 102 volts
 * d) 2.64 x 102 volts
 * e) 3.2 x 102 volts

7) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$2.5\Omega.$$
 * b) $$4.5\Omega.$$
 * c) None of these are true.
 * d) $$3.5\Omega.$$

8) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{7}{11}\Omega$$.
 * b) $$\frac{10}{21}\Omega$$.
 * c) $$\frac{21}{10}\Omega$$.
 * d) $$\frac{11}{7}\Omega$$.

9) A 5.9 ohm resistor is connected in series to a pair of 3 ohm resistors that are in parallel.  What is the net resistance?


 * a) 5.6 ohms.
 * b) 6.4 ohms.
 * c) 7.4 ohms.
 * d) 8.5 ohms.
 * e) 9.8 ohms.

10) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * a) 9.9 ohms.
 * b) 11.4 ohms.
 * c) 13.1 ohms.
 * d) 15.1 ohms.
 * e) 17.3 ohms.

T4 Q1
1) Two sources of emf &epsilon;1=45.3 V, and  &epsilon;2=13.3 V are oriented as shownin the circuit. The resistances are R1=3.82 k&Omega; and  R2=1.5 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=6.17 mA and I4=1.11 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * a) 1.177E+01 V
 * b) 1.295E+01 V
 * c) 1.424E+01 V
 * d) 1.567E+01 V
 * e) 1.723E+01 V

2) A 3.1 volt battery moves 52 Coulombs of charge in 1.7 hours. What is the power?


 * a) 1.79 x 10-2 W
 * b) 2.17 x 10-2 W
 * c) 2.63 x 10-2 W
 * d) 3.19 x 10-2 W
 * e) 3.87 x 10-2 W

3) Two 9.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * a) 5.4 ohms.
 * b) 6.2 ohms.
 * c) 7.1 ohms.
 * d) 8.2 ohms.
 * e) 9.4 ohms.

4) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.1 ohms.
 * b) 7 ohms.
 * c) 8.1 ohms.
 * d) 9.3 ohms.
 * e) 10.7 ohms.

5) Two sources of emf &epsilon;1=38.9 V, and  &epsilon;2=15.7 V are oriented as shownin the circuit. The resistances are R1=2.24 k&Omega; and  R2=2.23 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.01 mA and I4=0.86 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.955E+00 mA
 * b) 2.150E+00 mA
 * c) 2.365E+00 mA
 * d) 2.601E+00 mA
 * e) 2.862E+00 mA

6) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{21}\Omega$$.
 * b) $$\frac{11}{7}\Omega$$.
 * c) $$\frac{21}{10}\Omega$$.
 * d) $$\frac{7}{11}\Omega$$.

7) Calculate the electric field in a 12-gauge copper wire that is 48 m long and carries a current of 63 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.198E-04 V/m
 * b) 3.517E-04 V/m
 * c) 3.869E-04 V/m
 * d) 4.256E-04 V/m
 * e) 4.682E-04 V/m

8) A power supply delivers 114 watts of power to a 294 ohm resistor.  What was the applied voltage?


 * a) 1.25 x 102 volts
 * b) 1.51 x 102 volts
 * c) 1.83 x 102 volts
 * d) 2.22 x 102 volts
 * e) 2.69 x 102 volts

9) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$3.5\Omega.$$
 * b) $$4.5\Omega.$$
 * c) None of these are true.
 * d) $$2.5\Omega.$$

10) A DC winch moter draws 25 amps at 128 volts as it lifts a 5.710E+03 N weight at a constant speed of 0.449 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 8.413E-01 &Omega;
 * b) 9.254E-01 &Omega;
 * c) 1.018E+00 &Omega;
 * d) 1.120E+00 &Omega;
 * e) 1.232E+00 &Omega;

T4 Q2
1) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{21}\Omega$$.
 * b) $$\frac{11}{7}\Omega$$.
 * c) $$\frac{7}{11}\Omega$$.
 * d) $$\frac{21}{10}\Omega$$.

2) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) None of these are true.
 * b) $$4.5\Omega.$$
 * c) $$3.5\Omega.$$
 * d) $$2.5\Omega.$$

3) A 4 volt battery moves 19 Coulombs of charge in 1.3 hours. What is the power?


 * a) 1.62 x 10-2 W
 * b) 1.97 x 10-2 W
 * c) 2.38 x 10-2 W
 * d) 2.89 x 10-2 W
 * e) 3.5 x 10-2 W

4) A DC winch moter draws 23 amps at 170 volts as it lifts a 5.200E+03 N weight at a constant speed of 0.662 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 7.305E-01 &Omega;
 * b) 8.036E-01 &Omega;
 * c) 8.839E-01 &Omega;
 * d) 9.723E-01 &Omega;
 * e) 1.070E+00 &Omega;

5) Calculate the electric field in a 12-gauge copper wire that is 48 m long and carries a current of 63 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.198E-04 V/m
 * b) 3.517E-04 V/m
 * c) 3.869E-04 V/m
 * d) 4.256E-04 V/m
 * e) 4.682E-04 V/m

6) Two sources of emf &epsilon;1=49.6 V, and  &epsilon;2=19.3 V are oriented as shownin the circuit. The resistances are R1=4.87 k&Omega; and  R2=2.81 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.37 mA and I4=1.01 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 3.055E+00 mA
 * b) 3.360E+00 mA
 * c) 3.696E+00 mA
 * d) 4.066E+00 mA
 * e) 4.472E+00 mA

7) A power supply delivers 145 watts of power to a 244 ohm resistor.  What was the applied voltage?


 * a) 1.88 x 102 volts
 * b) 2.28 x 102 volts
 * c) 2.76 x 102 volts
 * d) 3.34 x 102 volts
 * e) 4.05 x 102 volts

8) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.1 ohms.
 * b) 7 ohms.
 * c) 8.1 ohms.
 * d) 9.3 ohms.
 * e) 10.7 ohms.

9) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * a) 6.5 ohms.
 * b) 7.5 ohms.
 * c) 8.6 ohms.
 * d) 9.9 ohms.
 * e) 11.4 ohms.

10) Two sources of emf &epsilon;1=39.4 V, and  &epsilon;2=12.2 V are oriented as shownin the circuit. The resistances are R1=3.84 k&Omega; and  R2=2.01 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.71 mA and I4=0.669 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * a) 8.825E+00 V
 * b) 9.708E+00 V
 * c) 1.068E+01 V
 * d) 1.175E+01 V
 * e) 1.292E+01 V

T4 R0
1) What is consumer cost to operate one 65&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.134 per kilowatt-hour?


 * a) $2.866E+01
 * b) $3.153E+01
 * c) $3.468E+01
 * d) $3.815E+01
 * e) $4.196E+01

2) A make-believe metal has a density of 6.650E+03 kg/m3 and an atomic mass of 67.5 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 4.456E+28 e&minus;/m3
 * b) 4.901E+28 e&minus;/m3
 * c) 5.392E+28 e&minus;/m3
 * d) 5.931E+28 e&minus;/m3
 * e) 6.524E+28 e&minus;/m3

3) Three resistors, R1 = 0.61 &Omega;, and R2 = R2 = 1.35 &Omega;, are connected in parallel to a 7.04 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 7.386E+01 W
 * b) 8.125E+01 W
 * c) 8.937E+01 W
 * d) 9.831E+01 W
 * e) 1.081E+02 W

4) Two sources of emf &epsilon;1=13.6 V, and  &epsilon;2=6.53 V are oriented as shownin the circuit. The resistances are R1=2.89 k&Omega; and  R2=2.12 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.11 mA and I4=0.311 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 7.264E-01 mA
 * b) 7.990E-01 mA
 * c) 8.789E-01 mA
 * d) 9.668E-01 mA
 * e) 1.063E+00 mA

5) A 195 Watt DC motor draws 0.49 amps of current. What is effective resistance?


 * a) 8.12 x 102 &Omega;
 * b) 9.84 x 102 &Omega;
 * c) 1.19 x 103 &Omega;
 * d) 1.44 x 103 &Omega;
 * e) 1.75 x 103 &Omega;

6) A power supply delivers 138 watts of power to a 206 ohm resistor.  What was the applied voltage?


 * a) 1.39 x 102 volts
 * b) 1.69 x 102 volts
 * c) 2.04 x 102 volts
 * d) 2.47 x 102 volts
 * e) 3 x 102 volts

7) What is the current through R1 and R2 in the figure shown?
 * a) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * b) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * c) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * d) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.

8) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{6}{3}\Omega$$.
 * b) $$\frac{3}{6}\Omega$$.
 * c) $$\frac{6}{11}\Omega$$.
 * d) $$\frac{11}{6}\Omega$$.

9) A battery has an emf of 5.5 volts, and an internal resistance of 296 $$k\Omega$$. It is connected to a 3.3 $$M\Omega$$ resistor.  What power is developed in the 3.3  $$M\Omega$$ resistor?


 * a) 7.72 $$\mu$$W.
 * b) 8.88 $$\mu$$W.
 * c) 10.21 $$\mu$$W.
 * d) 11.74 $$\mu$$W.
 * e) 13.5 $$\mu$$W.

10) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * a) 9.9 ohms.
 * b) 11.4 ohms.
 * c) 13.1 ohms.
 * d) 15.1 ohms.
 * e) 17.3 ohms.

T4 R1
1) What is consumer cost to operate one 65&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.134 per kilowatt-hour?


 * a) $2.866E+01
 * b) $3.153E+01
 * c) $3.468E+01
 * d) $3.815E+01
 * e) $4.196E+01

2) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * a) 7.09 $$\mu$$W.
 * b) 8.16 $$\mu$$W.
 * c) 9.38 $$\mu$$W.
 * d) 10.79 $$\mu$$W.
 * e) 12.41 $$\mu$$W.

3) Two sources of emf &epsilon;1=43.7 V, and  &epsilon;2=13.1 V are oriented as shownin the circuit. The resistances are R1=5.21 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.86 mA and I4=0.9 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 2.691E+00 mA
 * b) 2.960E+00 mA
 * c) 3.256E+00 mA
 * d) 3.582E+00 mA
 * e) 3.940E+00 mA

4) A make-believe metal has a density of 1.810E+04 kg/m3 and an atomic mass of 14.0 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 5.847E+29 e&minus;/m3
 * b) 6.432E+29 e&minus;/m3
 * c) 7.075E+29 e&minus;/m3
 * d) 7.783E+29 e&minus;/m3
 * e) 8.561E+29 e&minus;/m3

5) What is the current through R1 and R2 in the figure shown?
 * a) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * b) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * c) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * d) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.

6) Three resistors, R1 = 0.548 &Omega;, and R2 = R2 = 1.24 &Omega;, are connected in parallel to a 7.16 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 7.029E+01 W
 * b) 7.731E+01 W
 * c) 8.505E+01 W
 * d) 9.355E+01 W
 * e) 1.029E+02 W

7) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * a) 2.28 x 103 &Omega;
 * b) 2.76 x 103 &Omega;
 * c) 3.34 x 103 &Omega;
 * d) 4.05 x 103 &Omega;
 * e) 4.91 x 103 &Omega;

8) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * a) 6.5 ohms.
 * b) 7.5 ohms.
 * c) 8.6 ohms.
 * d) 9.9 ohms.
 * e) 11.4 ohms.

9) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{6}{11}\Omega$$.
 * b) $$\frac{6}{3}\Omega$$.
 * c) $$\frac{3}{6}\Omega$$.
 * d) $$\frac{11}{6}\Omega$$.

10) A power supply delivers 187 watts of power to a 287 ohm resistor.  What was the applied voltage?


 * a) 2.32 x 102 volts
 * b) 2.81 x 102 volts
 * c) 3.4 x 102 volts
 * d) 4.12 x 102 volts
 * e) 4.99 x 102 volts

T4 R2
1) A make-believe metal has a density of 3.230E+03 kg/m3 and an atomic mass of 116.0 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * a) 1.385E+28 e&minus;/m3
 * b) 1.524E+28 e&minus;/m3
 * c) 1.676E+28 e&minus;/m3
 * d) 1.844E+28 e&minus;/m3
 * e) 2.028E+28 e&minus;/m3

2) Three resistors, R1 = 1.82 &Omega;, and R2 = R2 = 4.14 &Omega;, are connected in parallel to a 5.65 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.754E+01 W
 * b) 1.929E+01 W
 * c) 2.122E+01 W
 * d) 2.335E+01 W
 * e) 2.568E+01 W

3) Two sources of emf &epsilon;1=39.0 V, and  &epsilon;2=15.9 V are oriented as shownin the circuit. The resistances are R1=3.4 k&Omega; and  R2=2.12 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.58 mA and I4=0.978 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 2.150E+00 mA
 * b) 2.365E+00 mA
 * c) 2.602E+00 mA
 * d) 2.862E+00 mA
 * e) 3.148E+00 mA

4) A battery has an emf of 5.6 volts, and an internal resistance of 295 $$k\Omega$$. It is connected to a 4.1 $$M\Omega$$ resistor.  What power is developed in the 4.1  $$M\Omega$$ resistor?


 * a) 3.81 $$\mu$$W.
 * b) 4.38 $$\mu$$W.
 * c) 5.03 $$\mu$$W.
 * d) 5.79 $$\mu$$W.
 * e) 6.66 $$\mu$$W.

5) Two 6.6 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * a) 4.4 ohms.
 * b) 5.1 ohms.
 * c) 5.8 ohms.
 * d) 6.7 ohms.
 * e) 7.7 ohms.

6) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * a) 2.28 x 103 &Omega;
 * b) 2.76 x 103 &Omega;
 * c) 3.34 x 103 &Omega;
 * d) 4.05 x 103 &Omega;
 * e) 4.91 x 103 &Omega;

7) A power supply delivers 187 watts of power to a 287 ohm resistor.  What was the applied voltage?


 * a) 2.32 x 102 volts
 * b) 2.81 x 102 volts
 * c) 3.4 x 102 volts
 * d) 4.12 x 102 volts
 * e) 4.99 x 102 volts

8) What is the current through R1 and R2 in the figure shown?
 * a) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * b) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * c) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * d) $$I_1 = 1A$$ and $$I_2 = 25A$$.

9) What is consumer cost to operate one 59&minus;W incandescent bulb for 10 hours per day for 1 year (365 days) if the cost of electricity is $0.132 per kilowatt-hour?


 * a) $2.584E+01
 * b) $2.843E+01
 * c) $3.127E+01
 * d) $3.440E+01
 * e) $3.784E+01

10) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{6}{3}\Omega$$.
 * b) $$\frac{11}{6}\Omega$$.
 * c) $$\frac{3}{6}\Omega$$.
 * d) $$\frac{6}{11}\Omega$$.

T4 S0
1) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=16 C  and $$\tau=$$0.0214 s. What is the current at $$t=$$0.0207 s?


 * a) 2.135E+02 A
 * b) 2.349E+02 A
 * c) 2.584E+02 A
 * d) 2.842E+02 A
 * e) 3.126E+02 A

2) Imagine a substance could be made into a very hot filament. Suppose the resitance is 1.56 &Omega; at a temperature of 97&deg;C and that the temperature coefficient of expansion is 5.020E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 340 &deg;C?


 * a) 3.463E+00 &Omega;
 * b) 3.636E+00 &Omega;
 * c) 3.818E+00 &Omega;
 * d) 4.009E+00 &Omega;
 * e) 4.209E+00 &Omega;

3) The resistances in the figure shown are R1= 2.49 &Omega;, R2= 1.72 &Omega;, and R2= 3.58 &Omega;. V1 and V3 are text 0.417 V and 1.83 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.53 V. What is the absolute value of the current through R1?


 * a) 8.220E-02 A
 * b) 9.042E-02 A
 * c) 9.946E-02 A
 * d) 1.094E-01 A
 * e) 1.203E-01 A

4) Three resistors, R1 = 1.41 &Omega;, and R2 = R2 = 3.17 &Omega;, are connected in parallel to a 5.89 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 1.681E+01 W
 * b) 1.849E+01 W
 * c) 2.033E+01 W
 * d) 2.237E+01 W
 * e) 2.460E+01 W

5) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * a) 2.61 x 10-2 W
 * b) 3.16 x 10-2 W
 * c) 3.83 x 10-2 W
 * d) 4.64 x 10-2 W
 * e) 5.62 x 10-2 W

6) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * a) 2.2 x 103 &Omega;
 * b) 2.67 x 103 &Omega;
 * c) 3.23 x 103 &Omega;
 * d) 3.91 x 103 &Omega;
 * e) 4.74 x 103 &Omega;

7) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * a) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * b) None of these are true.
 * c) It is not possible to connect that Number of Resistors in parallel.
 * d) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity

8) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * a) None of these are true
 * b) 5 Joules
 * c) 25 Joules
 * d) 3 Joules

9) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * a) 7.09 $$\mu$$W.
 * b) 8.16 $$\mu$$W.
 * c) 9.38 $$\mu$$W.
 * d) 10.79 $$\mu$$W.
 * e) 12.41 $$\mu$$W.

10) A 5.8 ohm resistor is connected in series to a pair of 2.8 ohm resistors that are in parallel.  What is the net resistance?


 * a) 7.2 ohms.
 * b) 8.3 ohms.
 * c) 9.5 ohms.
 * d) 11 ohms.
 * e) 12.6 ohms.

T4 S1
1) A battery has an emf of 5.6 volts, and an internal resistance of 460 $$k\Omega$$. It is connected to a 2.4 $$M\Omega$$ resistor.  What power is developed in the 2.4  $$M\Omega$$ resistor?


 * a) 6.05 $$\mu$$W.
 * b) 6.96 $$\mu$$W.
 * c) 8 $$\mu$$W.
 * d) 9.2 $$\mu$$W.
 * e) 10.58 $$\mu$$W.

2) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=87 C  and $$\tau=$$0.0154 s. What is the current at $$t=$$0.0211 s?


 * a) 1.435E+03 A
 * b) 1.579E+03 A
 * c) 1.737E+03 A
 * d) 1.910E+03 A
 * e) 2.102E+03 A

3) A 196 Watt DC motor draws 0.35 amps of current. What is effective resistance?


 * a) 1.6 x 103 &Omega;
 * b) 1.94 x 103 &Omega;
 * c) 2.35 x 103 &Omega;
 * d) 2.85 x 103 &Omega;
 * e) 3.45 x 103 &Omega;

4) Three resistors, R1 = 0.624 &Omega;, and R2 = R2 = 1.37 &Omega;, are connected in parallel to a 7.46 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 7.371E+01 W
 * b) 8.108E+01 W
 * c) 8.919E+01 W
 * d) 9.810E+01 W
 * e) 1.079E+02 W

5) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * a) None of these are true
 * b) 5 Joules
 * c) 3 Joules
 * d) 25 Joules

6) Imagine a substance could be made into a very hot filament. Suppose the resitance is 6.06 &Omega; at a temperature of 80&deg;C and that the temperature coefficient of expansion is 4.290E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 330 &deg;C?


 * a) 1.196E+01 &Omega;
 * b) 1.256E+01 &Omega;
 * c) 1.319E+01 &Omega;
 * d) 1.385E+01 &Omega;
 * e) 1.454E+01 &Omega;

7) A 4 volt battery moves 19 Coulombs of charge in 1.3 hours. What is the power?


 * a) 1.62 x 10-2 W
 * b) 1.97 x 10-2 W
 * c) 2.38 x 10-2 W
 * d) 2.89 x 10-2 W
 * e) 3.5 x 10-2 W

8) The resistances in the figure shown are R1= 2.34 &Omega;, R2= 1.34 &Omega;, and R2= 2.94 &Omega;. V1 and V3 are text 0.609 V and 1.68 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.541 V. What is the absolute value of the current through R1?


 * a) 1.464E-01 A
 * b) 1.610E-01 A
 * c) 1.772E-01 A
 * d) 1.949E-01 A
 * e) 2.144E-01 A

9) A 6.4 ohm resistor is connected in series to a pair of 7.4 ohm resistors that are in parallel.  What is the net resistance?


 * a) 10.1 ohms.
 * b) 11.6 ohms.
 * c) 13.4 ohms.
 * d) 15.4 ohms.
 * e) 17.7 ohms.

10) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * a) It is not possible to connect that Number of Resistors in parallel.
 * b) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity
 * c) None of these are true.
 * d) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.

T4 S2
1) A battery has an emf of 5.5 volts, and an internal resistance of 296 $$k\Omega$$. It is connected to a 3.3 $$M\Omega$$ resistor.  What power is developed in the 3.3  $$M\Omega$$ resistor?


 * a) 7.72 $$\mu$$W.
 * b) 8.88 $$\mu$$W.
 * c) 10.21 $$\mu$$W.
 * d) 11.74 $$\mu$$W.
 * e) 13.5 $$\mu$$W.

2) The resistances in the figure shown are R1= 2.67 &Omega;, R2= 1.78 &Omega;, and R2= 3.63 &Omega;. V1 and V3 are text 0.448 V and 2.29 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.656 V. What is the absolute value of the current through R1?


 * a) 9.287E-02 A
 * b) 1.022E-01 A
 * c) 1.124E-01 A
 * d) 1.236E-01 A
 * e) 1.360E-01 A

3) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * a) 2.2 x 103 &Omega;
 * b) 2.67 x 103 &Omega;
 * c) 3.23 x 103 &Omega;
 * d) 3.91 x 103 &Omega;
 * e) 4.74 x 103 &Omega;

4) Three resistors, R1 = 1.43 &Omega;, and R2 = R2 = 3.25 &Omega;, are connected in parallel to a 9.03 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * a) 5.184E+01 W
 * b) 5.702E+01 W
 * c) 6.272E+01 W
 * d) 6.900E+01 W
 * e) 7.590E+01 W

5) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * a) It is not possible to connect that Number of Resistors in parallel.
 * b) None of these are true.
 * c) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * d) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity

6) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * a) None of these are true
 * b) 3 Joules
 * c) 5 Joules
 * d) 25 Joules

7) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=42 C  and $$\tau=$$0.0166 s. What is the current at $$t=$$0.0156 s?


 * a) 9.886E+02 A
 * b) 1.087E+03 A
 * c) 1.196E+03 A
 * d) 1.316E+03 A
 * e) 1.447E+03 A

8) A 3.1 volt battery moves 52 Coulombs of charge in 1.7 hours. What is the power?


 * a) 1.79 x 10-2 W
 * b) 2.17 x 10-2 W
 * c) 2.63 x 10-2 W
 * d) 3.19 x 10-2 W
 * e) 3.87 x 10-2 W

9) A 5.8 ohm resistor is connected in series to a pair of 2.8 ohm resistors that are in parallel.  What is the net resistance?


 * a) 7.2 ohms.
 * b) 8.3 ohms.
 * c) 9.5 ohms.
 * d) 11 ohms.
 * e) 12.6 ohms.

10) Imagine a substance could be made into a very hot filament. Suppose the resitance is 5.88 &Omega; at a temperature of 87&deg;C and that the temperature coefficient of expansion is 5.290E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 547 &deg;C?


 * a) 1.831E+01 &Omega;
 * b) 1.923E+01 &Omega;
 * c) 2.019E+01 &Omega;
 * d) 2.120E+01 &Omega;
 * e) 2.226E+01 &Omega;

T4 T0
1) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=23 C  and $$\tau=$$0.0204 s. What is the current at $$t=$$0.0106 s?


 * a) 6.096E+02 A
 * b) 6.706E+02 A
 * c) 7.376E+02 A
 * d) 8.114E+02 A
 * e) 8.925E+02 A

2) What is consumer cost to operate one 77&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.124 per kilowatt-hour?


 * a) $3.142E+01
 * b) $3.456E+01
 * c) $3.802E+01
 * d) $4.182E+01
 * e) $4.600E+01

3) Two sources of emf &epsilon;1=30.6 V, and  &epsilon;2=12.0 V are oriented as shownin the circuit. The resistances are R1=3.46 k&Omega; and  R2=2.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.97 mA and I4=0.643 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 4.986E+00 V
 * b) 5.484E+00 V
 * c) 6.033E+00 V
 * d) 6.636E+00 V
 * e) 7.299E+00 V

4) A given battery has a 13 V emf and an internal resistance of 0.113 &Omega;. If it is connected to a 0.686 &Omega; resistor what is the power dissipated by that load?


 * a) 1.501E+02 W
 * b) 1.651E+02 W
 * c) 1.816E+02 W
 * d) 1.998E+02 W
 * e) 2.197E+02 W

5) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.7 x 10-4m/s
 * b) 3.27 x 10-4m/s
 * c) 3.96 x 10-4m/s
 * d) 4.79 x 10-4m/s
 * e) 5.81 x 10-4m/s

6) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * a) 5.42 x 102 &Omega;
 * b) 6.57 x 102 &Omega;
 * c) 7.95 x 102 &Omega;
 * d) 9.64 x 102 &Omega;
 * e) 1.17 x 103 &Omega;

7) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) The other point could be Negative or positive.
 * b) Voltage is a measure of Electric Potential difference between two electrical points.
 * c) None these are correct
 * d) It's an Electrical Cliche.

8) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{7}\Omega$$.
 * b) $$\frac{10}{6}\Omega$$.
 * c) $$\frac{6}{10}\Omega$$.
 * d) $$\frac{7}{10}\Omega$$.

9) A 5.7 ohm resistor is connected in series to a pair of 3.8 ohm resistors that are in parallel.  What is the net resistance?


 * a) 5 ohms.
 * b) 5.7 ohms.
 * c) 6.6 ohms.
 * d) 7.6 ohms.
 * e) 8.7 ohms.

10) An ideal 4.2 V voltage source is connected to two resistors in parallel.  One is 1.6$$k\Omega$$, and the other is 2.1 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.75 mA.
 * b) 0.86 mA.
 * c) 0.99 mA.
 * d) 1.14 mA.
 * e) 1.31 mA.

T4 T1
1) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * a) 8.3 ohms.
 * b) 9.6 ohms.
 * c) 11 ohms.
 * d) 12.7 ohms.
 * e) 14.5 ohms.

2) Two sources of emf &epsilon;1=30.6 V, and  &epsilon;2=12.0 V are oriented as shownin the circuit. The resistances are R1=3.46 k&Omega; and  R2=2.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.97 mA and I4=0.643 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 4.986E+00 V
 * b) 5.484E+00 V
 * c) 6.033E+00 V
 * d) 6.636E+00 V
 * e) 7.299E+00 V

3) A given battery has a 14 V emf and an internal resistance of 0.132 &Omega;. If it is connected to a 0.689 &Omega; resistor what is the power dissipated by that load?


 * a) 1.656E+02 W
 * b) 1.821E+02 W
 * c) 2.003E+02 W
 * d) 2.204E+02 W
 * e) 2.424E+02 W

4) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{6}\Omega$$.
 * b) $$\frac{10}{7}\Omega$$.
 * c) $$\frac{6}{10}\Omega$$.
 * d) $$\frac{7}{10}\Omega$$.

5) What is consumer cost to operate one 76&minus;W incandescent bulb for 9 hours per day for 1 year (365 days) if the cost of electricity is $0.144 per kilowatt-hour?


 * a) $3.595E+01
 * b) $3.955E+01
 * c) $4.350E+01
 * d) $4.785E+01
 * e) $5.264E+01

6) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * a) 5.42 x 102 &Omega;
 * b) 6.57 x 102 &Omega;
 * c) 7.95 x 102 &Omega;
 * d) 9.64 x 102 &Omega;
 * e) 1.17 x 103 &Omega;

7) An ideal 5.6 V voltage source is connected to two resistors in parallel.  One is 2.3$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.56 mA.
 * b) 0.64 mA.
 * c) 0.74 mA.
 * d) 0.85 mA.
 * e) 0.98 mA.

8) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) None these are correct
 * b) It's an Electrical Cliche.
 * c) The other point could be Negative or positive.
 * d) Voltage is a measure of Electric Potential difference between two electrical points.

9) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.7 x 10-4m/s
 * b) 3.27 x 10-4m/s
 * c) 3.96 x 10-4m/s
 * d) 4.79 x 10-4m/s
 * e) 5.81 x 10-4m/s

10) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=23 C  and $$\tau=$$0.0204 s. What is the current at $$t=$$0.0106 s?


 * a) 6.096E+02 A
 * b) 6.706E+02 A
 * c) 7.376E+02 A
 * d) 8.114E+02 A
 * e) 8.925E+02 A

T4 T2
1) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 1.47 mA.
 * b) 1.69 mA.
 * c) 1.94 mA.
 * d) 2.23 mA.
 * e) 2.57 mA.

2) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=84 C  and $$\tau=$$0.0199 s. What is the current at $$t=$$0.0104 s?


 * a) 2.275E+03 A
 * b) 2.503E+03 A
 * c) 2.753E+03 A
 * d) 3.029E+03 A
 * e) 3.331E+03 A

3) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.82 x 10-4m/s
 * b) 4.63 x 10-4m/s
 * c) 5.61 x 10-4m/s
 * d) 6.8 x 10-4m/s
 * e) 8.24 x 10-4m/s

4) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{6}{10}\Omega$$.
 * b) $$\frac{10}{7}\Omega$$.
 * c) $$\frac{10}{6}\Omega$$.
 * d) $$\frac{7}{10}\Omega$$.

5) A given battery has a 11 V emf and an internal resistance of 0.0998 &Omega;. If it is connected to a 0.417 &Omega; resistor what is the power dissipated by that load?


 * a) 1.419E+02 W
 * b) 1.561E+02 W
 * c) 1.717E+02 W
 * d) 1.889E+02 W
 * e) 2.078E+02 W

6) A 6.6 ohm resistor is connected in series to a pair of 6.4 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.4 ohms.
 * b) 7.4 ohms.
 * c) 8.5 ohms.
 * d) 9.8 ohms.
 * e) 11.3 ohms.

7) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * a) None these are correct
 * b) Voltage is a measure of Electric Potential difference between two electrical points.
 * c) It's an Electrical Cliche.
 * d) The other point could be Negative or positive.

8) What is consumer cost to operate one 91&minus;W incandescent bulb for 10 hours per day for 1 year (365 days) if the cost of electricity is $0.131 per kilowatt-hour?


 * a) $2.972E+01
 * b) $3.269E+01
 * c) $3.596E+01
 * d) $3.956E+01
 * e) $4.351E+01

9) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=11.5 V are oriented as shownin the circuit. The resistances are R1=2.13 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.11 mA and I4=0.746 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 4.275E+00 V
 * b) 4.703E+00 V
 * c) 5.173E+00 V
 * d) 5.691E+00 V
 * e) 6.260E+00 V

10) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * a) 7.74 x 102 &Omega;
 * b) 9.38 x 102 &Omega;
 * c) 1.14 x 103 &Omega;
 * d) 1.38 x 103 &Omega;
 * e) 1.67 x 103 &Omega;

T4 U0
1) Calculate the drift speed of electrons in a copper wire with a diameter of 4.9 mm carrying a 6.43 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * a) 2.109E-05 m/s
 * b) 2.320E-05 m/s
 * c) 2.552E-05 m/s
 * d) 2.807E-05 m/s
 * e) 3.088E-05 m/s

2) Calculate the electric field in a 12-gauge copper wire that is 48 m long and carries a current of 63 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.198E-04 V/m
 * b) 3.517E-04 V/m
 * c) 3.869E-04 V/m
 * d) 4.256E-04 V/m
 * e) 4.682E-04 V/m

3) The resistances in the figure shown are R1= 2.34 &Omega;, R2= 1.34 &Omega;, and R2= 2.94 &Omega;. V1 and V3 are text 0.609 V and 1.68 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.541 V. What is the absolute value of the current through R1?


 * a) 1.464E-01 A
 * b) 1.610E-01 A
 * c) 1.772E-01 A
 * d) 1.949E-01 A
 * e) 2.144E-01 A

4) Two sources of emf &epsilon;1=38.8 V, and  &epsilon;2=14.9 V are oriented as shownin the circuit. The resistances are R1=5.83 k&Omega; and  R2=1.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.57 mA and I4=1.19 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 1.013E+01 V
 * b) 1.115E+01 V
 * c) 1.226E+01 V
 * d) 1.349E+01 V
 * e) 1.484E+01 V

5) A power supply delivers 187 watts of power to a 287 ohm resistor.  What was the applied voltage?


 * a) 2.32 x 102 volts
 * b) 2.81 x 102 volts
 * c) 3.4 x 102 volts
 * d) 4.12 x 102 volts
 * e) 4.99 x 102 volts

6) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * a) 7.74 x 102 &Omega;
 * b) 9.38 x 102 &Omega;
 * c) 1.14 x 103 &Omega;
 * d) 1.38 x 103 &Omega;
 * e) 1.67 x 103 &Omega;

7) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{7}{11}\Omega$$.
 * b) $$\frac{21}{10}\Omega$$.
 * c) $$\frac{11}{7}\Omega$$.
 * d) $$\frac{10}{21}\Omega$$.

8) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * a) 8W
 * b) 3W
 * c) 2.2W
 * d) 24W

9) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * a) 8.3 ohms.
 * b) 9.6 ohms.
 * c) 11 ohms.
 * d) 12.7 ohms.
 * e) 14.5 ohms.

10) An ideal 6 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 25$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 70.6 A.
 * b) 81.2 A.
 * c) 93.4 A.
 * d) 107.4 A.
 * e) 123.5 A.

T4 U1
1) The resistances in the figure shown are R1= 2.67 &Omega;, R2= 1.78 &Omega;, and R2= 3.63 &Omega;. V1 and V3 are text 0.448 V and 2.29 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.656 V. What is the absolute value of the current through R1?


 * a) 9.287E-02 A
 * b) 1.022E-01 A
 * c) 1.124E-01 A
 * d) 1.236E-01 A
 * e) 1.360E-01 A

2) Calculate the drift speed of electrons in a copper wire with a diameter of 2.72 mm carrying a 16.2 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * a) 2.087E-04 m/s
 * b) 2.295E-04 m/s
 * c) 2.525E-04 m/s
 * d) 2.777E-04 m/s
 * e) 3.055E-04 m/s

3) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.1 ohms.
 * b) 7 ohms.
 * c) 8.1 ohms.
 * d) 9.3 ohms.
 * e) 10.7 ohms.

4) An ideal 5.9 volt battery is connected to a 0.059 ohm resistor.  To measure the current an ammeter with a resistance of 24$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 71.1 A.
 * b) 81.7 A.
 * c) 94 A.
 * d) 108.1 A.
 * e) 124.3 A.

5) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{21}\Omega$$.
 * b) $$\frac{7}{11}\Omega$$.
 * c) $$\frac{21}{10}\Omega$$.
 * d) $$\frac{11}{7}\Omega$$.

6) Two sources of emf &epsilon;1=57.0 V, and  &epsilon;2=18.1 V are oriented as shownin the circuit. The resistances are R1=4.95 k&Omega; and  R2=2.09 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.23 mA and I4=1.04 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 1.921E+01 V
 * b) 2.114E+01 V
 * c) 2.325E+01 V
 * d) 2.557E+01 V
 * e) 2.813E+01 V

7) Calculate the electric field in a 12-gauge copper wire that is 23 m long and carries a current of 64 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 2.953E-04 V/m
 * b) 3.248E-04 V/m
 * c) 3.573E-04 V/m
 * d) 3.930E-04 V/m
 * e) 4.324E-04 V/m

8) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * a) 2.2 x 103 &Omega;
 * b) 2.67 x 103 &Omega;
 * c) 3.23 x 103 &Omega;
 * d) 3.91 x 103 &Omega;
 * e) 4.74 x 103 &Omega;

9) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * a) 8.42 x 101 volts
 * b) 1.02 x 102 volts
 * c) 1.24 x 102 volts
 * d) 1.5 x 102 volts
 * e) 1.81 x 102 volts

10) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * a) 3W
 * b) 8W
 * c) 24W
 * d) 2.2W

T4 U2
1) A 6.4 ohm resistor is connected in series to a pair of 7.4 ohm resistors that are in parallel.  What is the net resistance?


 * a) 10.1 ohms.
 * b) 11.6 ohms.
 * c) 13.4 ohms.
 * d) 15.4 ohms.
 * e) 17.7 ohms.

2) Calculate the drift speed of electrons in a copper wire with a diameter of 4.49 mm carrying a 11.6 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * a) 4.120E-05 m/s
 * b) 4.532E-05 m/s
 * c) 4.985E-05 m/s
 * d) 5.483E-05 m/s
 * e) 6.032E-05 m/s

3) Calculate the electric field in a 12-gauge copper wire that is 99 m long and carries a current of 71 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.604E-04 V/m
 * b) 3.964E-04 V/m
 * c) 4.360E-04 V/m
 * d) 4.796E-04 V/m
 * e) 5.276E-04 V/m

4) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{10}{21}\Omega$$.
 * b) $$\frac{7}{11}\Omega$$.
 * c) $$\frac{21}{10}\Omega$$.
 * d) $$\frac{11}{7}\Omega$$.

5) Two sources of emf &epsilon;1=26.8 V, and  &epsilon;2=10.1 V are oriented as shownin the circuit. The resistances are R1=2.2 k&Omega; and  R2=2.55 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.29 mA and I4=0.464 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 3.436E+00 V
 * b) 3.779E+00 V
 * c) 4.157E+00 V
 * d) 4.573E+00 V
 * e) 5.030E+00 V

6) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * a) 2.2W
 * b) 24W
 * c) 3W
 * d) 8W

7) The resistances in the figure shown are R1= 2.67 &Omega;, R2= 1.78 &Omega;, and R2= 3.63 &Omega;. V1 and V3 are text 0.448 V and 2.29 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.656 V. What is the absolute value of the current through R1?


 * a) 9.287E-02 A
 * b) 1.022E-01 A
 * c) 1.124E-01 A
 * d) 1.236E-01 A
 * e) 1.360E-01 A

8) A power supply delivers 145 watts of power to a 132 ohm resistor.  What was the applied voltage?


 * a) 6.42 x 101 volts
 * b) 7.78 x 101 volts
 * c) 9.43 x 101 volts
 * d) 1.14 x 102 volts
 * e) 1.38 x 102 volts

9) An ideal 5.9 volt battery is connected to a 0.059 ohm resistor.  To measure the current an ammeter with a resistance of 24$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 71.1 A.
 * b) 81.7 A.
 * c) 94 A.
 * d) 108.1 A.
 * e) 124.3 A.

10) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * a) 2.28 x 103 &Omega;
 * b) 2.76 x 103 &Omega;
 * c) 3.34 x 103 &Omega;
 * d) 4.05 x 103 &Omega;
 * e) 4.91 x 103 &Omega;

T4 V0
1) Calculate the drift speed of electrons in a copper wire with a diameter of 5.47 mm carrying a 3.48 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * a) 1.008E-05 m/s
 * b) 1.108E-05 m/s
 * c) 1.219E-05 m/s
 * d) 1.341E-05 m/s
 * e) 1.475E-05 m/s

2) A device requires consumes 73 W of power and requires 9.14 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 1.187E+06 A/m2
 * b) 1.306E+06 A/m2
 * c) 1.436E+06 A/m2
 * d) 1.580E+06 A/m2
 * e) 1.738E+06 A/m2

3) The resistances in the figure shown are R1= 1.81 &Omega;, R2= 1.18 &Omega;, and R2= 2.62 &Omega;. V1 and V3 are text 0.628 V and 2.54 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.748 V. What is the absolute value of the current through R1?


 * a) 1.552E-01 A
 * b) 1.707E-01 A
 * c) 1.878E-01 A
 * d) 2.065E-01 A
 * e) 2.272E-01 A

4) Two sources of emf &epsilon;1=40.6 V, and  &epsilon;2=13.5 V are oriented as shownin the circuit. The resistances are R1=4.35 k&Omega; and  R2=2.44 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.73 mA and I4=0.78 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.332E+00 mA
 * b) 1.465E+00 mA
 * c) 1.612E+00 mA
 * d) 1.773E+00 mA
 * e) 1.950E+00 mA

5) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.77 x 10-5m/s
 * b) 3.36 x 10-5m/s
 * c) 4.06 x 10-5m/s
 * d) 4.92 x 10-5m/s
 * e) 5.97 x 10-5m/s

6) A 4 volt battery moves 19 Coulombs of charge in 1.3 hours. What is the power?


 * a) 1.62 x 10-2 W
 * b) 1.97 x 10-2 W
 * c) 2.38 x 10-2 W
 * d) 2.89 x 10-2 W
 * e) 3.5 x 10-2 W

7) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * a) I = 5A &  P = 25W.
 * b) I = 5A &  P = 5W.
 * c) I = 5A &  P = 3W.
 * d) I = 5A &  P = 9W

8) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{11}{7}\Omega$$.
 * b) $$\frac{21}{10}\Omega$$.
 * c) $$\frac{7}{11}\Omega$$.
 * d) $$\frac{10}{21}\Omega$$.

9) Two 9.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * a) 5.4 ohms.
 * b) 6.2 ohms.
 * c) 7.1 ohms.
 * d) 8.2 ohms.
 * e) 9.4 ohms.

10) A 5.8 ohm resistor is connected in series to a pair of 2.8 ohm resistors that are in parallel.  What is the net resistance?


 * a) 7.2 ohms.
 * b) 8.3 ohms.
 * c) 9.5 ohms.
 * d) 11 ohms.
 * e) 12.6 ohms.

T4 V1
1) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * a) I = 5A &  P = 25W.
 * b) I = 5A &  P = 5W.
 * c) I = 5A &  P = 9W
 * d) I = 5A &  P = 3W.

2) The resistances in the figure shown are R1= 1.81 &Omega;, R2= 1.18 &Omega;, and R2= 2.62 &Omega;. V1 and V3 are text 0.628 V and 2.54 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.748 V. What is the absolute value of the current through R1?


 * a) 1.552E-01 A
 * b) 1.707E-01 A
 * c) 1.878E-01 A
 * d) 2.065E-01 A
 * e) 2.272E-01 A

3) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * a) 7.85 x 10-3 W
 * b) 9.51 x 10-3 W
 * c) 1.15 x 10-2 W
 * d) 1.4 x 10-2 W
 * e) 1.69 x 10-2 W

4) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{11}{7}\Omega$$.
 * b) $$\frac{10}{21}\Omega$$.
 * c) $$\frac{21}{10}\Omega$$.
 * d) $$\frac{7}{11}\Omega$$.

5) A 5.9 ohm resistor is connected in series to a pair of 3 ohm resistors that are in parallel.  What is the net resistance?


 * a) 5.6 ohms.
 * b) 6.4 ohms.
 * c) 7.4 ohms.
 * d) 8.5 ohms.
 * e) 9.8 ohms.

6) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * a) 3.1 ohms.
 * b) 3.6 ohms.
 * c) 4.2 ohms.
 * d) 4.8 ohms.
 * e) 5.5 ohms.

7) Calculate the drift speed of electrons in a copper wire with a diameter of 3.33 mm carrying a 13.8 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * a) 8.910E-05 m/s
 * b) 9.801E-05 m/s
 * c) 1.078E-04 m/s
 * d) 1.186E-04 m/s
 * e) 1.305E-04 m/s

8) Two sources of emf &epsilon;1=40.3 V, and  &epsilon;2=16.8 V are oriented as shownin the circuit. The resistances are R1=2.57 k&Omega; and  R2=2.25 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.96 mA and I4=0.752 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.825E+00 mA
 * b) 2.007E+00 mA
 * c) 2.208E+00 mA
 * d) 2.429E+00 mA
 * e) 2.672E+00 mA

9) A device requires consumes 103 W of power and requires 6.3 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 8.999E+05 A/m2
 * b) 9.899E+05 A/m2
 * c) 1.089E+06 A/m2
 * d) 1.198E+06 A/m2
 * e) 1.317E+06 A/m2

10) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.77 x 10-5m/s
 * b) 3.36 x 10-5m/s
 * c) 4.06 x 10-5m/s
 * d) 4.92 x 10-5m/s
 * e) 5.97 x 10-5m/s

T4 V2
1) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * a) 9.9 ohms.
 * b) 11.4 ohms.
 * c) 13.1 ohms.
 * d) 15.1 ohms.
 * e) 17.3 ohms.

2) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * a) 8.3 ohms.
 * b) 9.6 ohms.
 * c) 11 ohms.
 * d) 12.7 ohms.
 * e) 14.5 ohms.

3) Two sources of emf &epsilon;1=40.6 V, and  &epsilon;2=13.5 V are oriented as shownin the circuit. The resistances are R1=4.35 k&Omega; and  R2=2.44 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.73 mA and I4=0.78 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.332E+00 mA
 * b) 1.465E+00 mA
 * c) 1.612E+00 mA
 * d) 1.773E+00 mA
 * e) 1.950E+00 mA

4) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.77 x 10-5m/s
 * b) 3.36 x 10-5m/s
 * c) 4.06 x 10-5m/s
 * d) 4.92 x 10-5m/s
 * e) 5.97 x 10-5m/s

5) A device requires consumes 81 W of power and requires 2.34 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 3.342E+05 A/m2
 * b) 3.677E+05 A/m2
 * c) 4.044E+05 A/m2
 * d) 4.449E+05 A/m2
 * e) 4.894E+05 A/m2

6) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * a) I = 5A &  P = 3W.
 * b) I = 5A &  P = 25W.
 * c) I = 5A &  P = 5W.
 * d) I = 5A &  P = 9W

7) A 3.1 volt battery moves 52 Coulombs of charge in 1.7 hours. What is the power?


 * a) 1.79 x 10-2 W
 * b) 2.17 x 10-2 W
 * c) 2.63 x 10-2 W
 * d) 3.19 x 10-2 W
 * e) 3.87 x 10-2 W

8) Calculate the drift speed of electrons in a copper wire with a diameter of 5.82 mm carrying a 9.11 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * a) 1.926E-05 m/s
 * b) 2.118E-05 m/s
 * c) 2.330E-05 m/s
 * d) 2.563E-05 m/s
 * e) 2.819E-05 m/s

9) The resistances in the figure shown are R1= 2.24 &Omega;, R2= 1.03 &Omega;, and R2= 2.39 &Omega;. V1 and V3 are text 0.595 V and 2.58 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.707 V. What is the absolute value of the current through R1?


 * a) 1.834E-01 A
 * b) 2.018E-01 A
 * c) 2.220E-01 A
 * d) 2.441E-01 A
 * e) 2.686E-01 A

10) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{11}{7}\Omega$$.
 * b) $$\frac{21}{10}\Omega$$.
 * c) $$\frac{10}{21}\Omega$$.
 * d) $$\frac{7}{11}\Omega$$.

T4 W0
1) A DC winch moter draws 25 amps at 128 volts as it lifts a 5.710E+03 N weight at a constant speed of 0.449 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 8.413E-01 &Omega;
 * b) 9.254E-01 &Omega;
 * c) 1.018E+00 &Omega;
 * d) 1.120E+00 &Omega;
 * e) 1.232E+00 &Omega;

2) Calculate the electric field in a 12-gauge copper wire that is 16 m long and carries a current of 58 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 2.212E-04 V/m
 * b) 2.433E-04 V/m
 * c) 2.676E-04 V/m
 * d) 2.944E-04 V/m
 * e) 3.238E-04 V/m

3) Two sources of emf &epsilon;1=46.1 V, and  &epsilon;2=16.2 V are oriented as shownin the circuit. The resistances are R1=5.17 k&Omega; and  R2=2.06 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.97 mA and I4=1.07 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * a) 1.309E+01 V
 * b) 1.440E+01 V
 * c) 1.584E+01 V
 * d) 1.742E+01 V
 * e) 1.917E+01 V

4) In the circuit shown V=18.8 V, R1=2.59 &Omega;, R2=5.47 &Omega;, and R3=15.8 &Omega;. What is the power dissipated by R2?


 * a) 2.191E+01 W
 * b) 2.410E+01 W
 * c) 2.651E+01 W
 * d) 2.916E+01 W
 * e) 3.208E+01 W

5) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.7 x 10-4m/s
 * b) 3.27 x 10-4m/s
 * c) 3.96 x 10-4m/s
 * d) 4.79 x 10-4m/s
 * e) 5.81 x 10-4m/s

6) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * a) 2.61 x 10-2 W
 * b) 3.16 x 10-2 W
 * c) 3.83 x 10-2 W
 * d) 4.64 x 10-2 W
 * e) 5.62 x 10-2 W

7) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * a) 11.67 Joules
 * b) 2.5 Watts
 * c) None of these are ture.
 * d) 1.67 Watts

8) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * a) 2.2W
 * b) 24W
 * c) 3W
 * d) 8W

9) An ideal 7.5 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 19$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 54.3 A.
 * b) 62.4 A.
 * c) 71.8 A.
 * d) 82.6 A.
 * e) 94.9 A.

10) A battery has an emf of 5.5 volts, and an internal resistance of 296 $$k\Omega$$. It is connected to a 3.3 $$M\Omega$$ resistor.  What power is developed in the 3.3  $$M\Omega$$ resistor?


 * a) 7.72 $$\mu$$W.
 * b) 8.88 $$\mu$$W.
 * c) 10.21 $$\mu$$W.
 * d) 11.74 $$\mu$$W.
 * e) 13.5 $$\mu$$W.

T4 W1
1) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * a) 4.14 x 10-2 W
 * b) 5.02 x 10-2 W
 * c) 6.08 x 10-2 W
 * d) 7.37 x 10-2 W
 * e) 8.93 x 10-2 W

2) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.07 x 10-5m/s
 * b) 3.72 x 10-5m/s
 * c) 4.5 x 10-5m/s
 * d) 5.46 x 10-5m/s
 * e) 6.61 x 10-5m/s

3) An ideal 7.5 volt battery is connected to a 0.084 ohm resistor.  To measure the current an ammeter with a resistance of 14$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 43.8 A.
 * b) 50.3 A.
 * c) 57.9 A.
 * d) 66.5 A.
 * e) 76.5 A.

4) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * a) 1.67 Watts
 * b) 11.67 Joules
 * c) 2.5 Watts
 * d) None of these are ture.

5) Two sources of emf &epsilon;1=40.9 V, and  &epsilon;2=16.1 V are oriented as shownin the circuit. The resistances are R1=5.55 k&Omega; and  R2=1.55 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=6.11 mA and I4=1.06 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * a) 8.754E+00 V
 * b) 9.630E+00 V
 * c) 1.059E+01 V
 * d) 1.165E+01 V
 * e) 1.282E+01 V

6) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * a) 3W
 * b) 24W
 * c) 2.2W
 * d) 8W

7) Calculate the electric field in a 12-gauge copper wire that is 41 m long and carries a current of 71 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.604E-04 V/m
 * b) 3.964E-04 V/m
 * c) 4.360E-04 V/m
 * d) 4.796E-04 V/m
 * e) 5.276E-04 V/m

8) A DC winch moter draws 25 amps at 128 volts as it lifts a 5.710E+03 N weight at a constant speed of 0.449 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 8.413E-01 &Omega;
 * b) 9.254E-01 &Omega;
 * c) 1.018E+00 &Omega;
 * d) 1.120E+00 &Omega;
 * e) 1.232E+00 &Omega;

9) In the circuit shown V=17.9 V, R1=1.68 &Omega;, R2=7.84 &Omega;, and R3=12.3 &Omega;. What is the power dissipated by R2?


 * a) 2.240E+01 W
 * b) 2.464E+01 W
 * c) 2.710E+01 W
 * d) 2.981E+01 W
 * e) 3.279E+01 W

10) A battery has an emf of 5.3 volts, and an internal resistance of 428 $$k\Omega$$. It is connected to a 2.3 $$M\Omega$$ resistor.  What power is developed in the 2.3  $$M\Omega$$ resistor?


 * a) 4.96 $$\mu$$W.
 * b) 5.71 $$\mu$$W.
 * c) 6.56 $$\mu$$W.
 * d) 7.55 $$\mu$$W.
 * e) 8.68 $$\mu$$W.

T4 W2
1) A DC winch moter draws 23 amps at 170 volts as it lifts a 5.200E+03 N weight at a constant speed of 0.662 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 7.305E-01 &Omega;
 * b) 8.036E-01 &Omega;
 * c) 8.839E-01 &Omega;
 * d) 9.723E-01 &Omega;
 * e) 1.070E+00 &Omega;

2) A battery has an emf of 5.6 volts, and an internal resistance of 450 $$k\Omega$$. It is connected to a 2.7 $$M\Omega$$ resistor.  What power is developed in the 2.7  $$M\Omega$$ resistor?


 * a) 4.88 $$\mu$$W.
 * b) 5.61 $$\mu$$W.
 * c) 6.45 $$\mu$$W.
 * d) 7.42 $$\mu$$W.
 * e) 8.53 $$\mu$$W.

3) In the circuit shown V=13.5 V, R1=2.66 &Omega;, R2=7.29 &Omega;, and R3=14.5 &Omega;. What is the power dissipated by R2?


 * a) 7.123E+00 W
 * b) 7.835E+00 W
 * c) 8.618E+00 W
 * d) 9.480E+00 W
 * e) 1.043E+01 W

4) A 5.8 volt battery moves 95 Coulombs of charge in 0.3 hours. What is the power?


 * a) 4.21 x 10-1 W
 * b) 5.1 x 10-1 W
 * c) 6.18 x 10-1 W
 * d) 7.49 x 10-1 W
 * e) 9.07 x 10-1 W

5) An ideal 5.9 volt battery is connected to a 0.059 ohm resistor.  To measure the current an ammeter with a resistance of 24$$m\Omega$$ is used.  What current does the ammeter actually read?


 * a) 71.1 A.
 * b) 81.7 A.
 * c) 94 A.
 * d) 108.1 A.
 * e) 124.3 A.

6) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * a) 3W
 * b) 8W
 * c) 24W
 * d) 2.2W

7) Two sources of emf &epsilon;1=67.2 V, and  &epsilon;2=18.7 V are oriented as shownin the circuit. The resistances are R1=3.45 k&Omega; and  R2=1.2 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=9.49 mA and I4=1.81 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * a) 1.906E+01 V
 * b) 2.097E+01 V
 * c) 2.306E+01 V
 * d) 2.537E+01 V
 * e) 2.790E+01 V

8) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.82 x 10-4m/s
 * b) 4.63 x 10-4m/s
 * c) 5.61 x 10-4m/s
 * d) 6.8 x 10-4m/s
 * e) 8.24 x 10-4m/s

9) Calculate the electric field in a 12-gauge copper wire that is 18 m long and carries a current of 22 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 1.117E-04 V/m
 * b) 1.228E-04 V/m
 * c) 1.351E-04 V/m
 * d) 1.486E-04 V/m
 * e) 1.635E-04 V/m

10) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * a) 1.67 Watts
 * b) 11.67 Joules
 * c) 2.5 Watts
 * d) None of these are ture.

T4 X0
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 4.48 &Omega; at a temperature of 56&deg;C and that the temperature coefficient of expansion is 4.550E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 449 &deg;C?


 * a) 1.028E+01 &Omega;
 * b) 1.079E+01 &Omega;
 * c) 1.133E+01 &Omega;
 * d) 1.190E+01 &Omega;
 * e) 1.249E+01 &Omega;

2) Calculate the resistance of a 12-gauge copper wire that is 10 m long and carries a current of 41 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.467E-02 &Omega;
 * b) 3.813E-02 &Omega;
 * c) 4.195E-02 &Omega;
 * d) 4.614E-02 &Omega;
 * e) 5.076E-02 &Omega;

3) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 554 V.  If the combined external and internal resistance is 228 &Omega and the capacitance is  93 mF, how long will it take for the capacitor's voltage to reach 450.0 V?


 * a) 3.224E+01 s
 * b) 3.547E+01 s
 * c) 3.902E+01 s
 * d) 4.292E+01 s
 * e) 4.721E+01 s

4) A given battery has a 14 V emf and an internal resistance of 0.192 &Omega;. If it is connected to a 0.766 &Omega; resistor what is the power dissipated by that load?


 * a) 1.229E+02 W
 * b) 1.352E+02 W
 * c) 1.487E+02 W
 * d) 1.636E+02 W
 * e) 1.799E+02 W

5) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 6.77 x 10-5m/s
 * b) 8.2 x 10-5m/s
 * c) 9.93 x 10-5m/s
 * d) 1.2 x 10-4m/s
 * e) 1.46 x 10-4m/s

6) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * a) 2.2 x 103 &Omega;
 * b) 2.67 x 103 &Omega;
 * c) 3.23 x 103 &Omega;
 * d) 3.91 x 103 &Omega;
 * e) 4.74 x 103 &Omega;

7) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$4.5\Omega.$$
 * b) $$2.5\Omega.$$
 * c) None of these are true.
 * d) $$3.5\Omega.$$

8) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * a) 1.67 Watts
 * b) 2.5 Watts
 * c) 11.67 Joules
 * d) None of these are ture.

9) Two 7.8 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.4 ohm resistor.  What is the net resistance?


 * a) 9.3 ohms.
 * b) 10.7 ohms.
 * c) 12.3 ohms.
 * d) 14.1 ohms.
 * e) 16.3 ohms.

10) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 1.47 mA.
 * b) 1.69 mA.
 * c) 1.94 mA.
 * d) 2.23 mA.
 * e) 2.57 mA.

T4 X1
1) Two 7.8 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.4 ohm resistor.  What is the net resistance?


 * a) 9.3 ohms.
 * b) 10.7 ohms.
 * c) 12.3 ohms.
 * d) 14.1 ohms.
 * e) 16.3 ohms.

2) An ideal 3.1 V voltage source is connected to two resistors in parallel.  One is 1.5$$k\Omega$$, and the other is 2.2 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.55 mA.
 * b) 0.63 mA.
 * c) 0.73 mA.
 * d) 0.84 mA.
 * e) 0.96 mA.

3) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) $$3.5\Omega.$$
 * b) None of these are true.
 * c) $$4.5\Omega.$$
 * d) $$2.5\Omega.$$

4) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * a) 2.5 Watts
 * b) None of these are ture.
 * c) 11.67 Joules
 * d) 1.67 Watts

5) A 196 Watt DC motor draws 0.35 amps of current. What is effective resistance?


 * a) 1.6 x 103 &Omega;
 * b) 1.94 x 103 &Omega;
 * c) 2.35 x 103 &Omega;
 * d) 2.85 x 103 &Omega;
 * e) 3.45 x 103 &Omega;

6) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.82 x 10-4m/s
 * b) 4.63 x 10-4m/s
 * c) 5.61 x 10-4m/s
 * d) 6.8 x 10-4m/s
 * e) 8.24 x 10-4m/s

7) Calculate the resistance of a 12-gauge copper wire that is 13 m long and carries a current of 22 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 4.957E-02 &Omega;
 * b) 5.453E-02 &Omega;
 * c) 5.998E-02 &Omega;
 * d) 6.598E-02 &Omega;
 * e) 7.258E-02 &Omega;

8) A given battery has a 12 V emf and an internal resistance of 0.0984 &Omega;. If it is connected to a 0.485 &Omega; resistor what is the power dissipated by that load?


 * a) 2.052E+02 W
 * b) 2.257E+02 W
 * c) 2.483E+02 W
 * d) 2.731E+02 W
 * e) 3.004E+02 W

9) Imagine a substance could be made into a very hot filament. Suppose the resitance is 1.56 &Omega; at a temperature of 97&deg;C and that the temperature coefficient of expansion is 5.020E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 340 &deg;C?


 * a) 3.463E+00 &Omega;
 * b) 3.636E+00 &Omega;
 * c) 3.818E+00 &Omega;
 * d) 4.009E+00 &Omega;
 * e) 4.209E+00 &Omega;

10) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 505 V.  If the combined external and internal resistance is 189 &Omega and the capacitance is  74 mF, how long will it take for the capacitor's voltage to reach 374.0 V?


 * a) 1.560E+01 s
 * b) 1.716E+01 s
 * c) 1.887E+01 s
 * d) 2.076E+01 s
 * e) 2.284E+01 s

T4 X2
1) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.77 x 10-5m/s
 * b) 3.36 x 10-5m/s
 * c) 4.06 x 10-5m/s
 * d) 4.92 x 10-5m/s
 * e) 5.97 x 10-5m/s

2) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 505 V.  If the combined external and internal resistance is 189 &Omega and the capacitance is  74 mF, how long will it take for the capacitor's voltage to reach 374.0 V?


 * a) 1.560E+01 s
 * b) 1.716E+01 s
 * c) 1.887E+01 s
 * d) 2.076E+01 s
 * e) 2.284E+01 s

3) An ideal 3.1 V voltage source is connected to two resistors in parallel.  One is 1.5$$k\Omega$$, and the other is 2.2 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.55 mA.
 * b) 0.63 mA.
 * c) 0.73 mA.
 * d) 0.84 mA.
 * e) 0.96 mA.

4) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * a) 1.67 Watts
 * b) 11.67 Joules
 * c) None of these are ture.
 * d) 2.5 Watts

5) Calculate the resistance of a 12-gauge copper wire that is 11 m long and carries a current of 94 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 3.813E-02 &Omega;
 * b) 4.195E-02 &Omega;
 * c) 4.614E-02 &Omega;
 * d) 5.076E-02 &Omega;
 * e) 5.583E-02 &Omega;

6) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * a) None of these are true.
 * b) $$2.5\Omega.$$
 * c) $$4.5\Omega.$$
 * d) $$3.5\Omega.$$

7) Imagine a substance could be made into a very hot filament. Suppose the resitance is 2.89 &Omega; at a temperature of 89&deg;C and that the temperature coefficient of expansion is 5.340E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 566 &deg;C?


 * a) 9.763E+00 &Omega;
 * b) 1.025E+01 &Omega;
 * c) 1.076E+01 &Omega;
 * d) 1.130E+01 &Omega;
 * e) 1.187E+01 &Omega;

8) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * a) 7.74 x 102 &Omega;
 * b) 9.38 x 102 &Omega;
 * c) 1.14 x 103 &Omega;
 * d) 1.38 x 103 &Omega;
 * e) 1.67 x 103 &Omega;

9) Two 7 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.8 ohm resistor.  What is the net resistance?


 * a) 5.5 ohms.
 * b) 6.3 ohms.
 * c) 7.2 ohms.
 * d) 8.3 ohms.
 * e) 9.6 ohms.

10) A given battery has a 15 V emf and an internal resistance of 0.0536 &Omega;. If it is connected to a 0.64 &Omega; resistor what is the power dissipated by that load?


 * a) 2.721E+02 W
 * b) 2.993E+02 W
 * c) 3.293E+02 W
 * d) 3.622E+02 W
 * e) 3.984E+02 W

T4 Y0
1) A DC winch moter draws 25 amps at 128 volts as it lifts a 5.710E+03 N weight at a constant speed of 0.449 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 8.413E-01 &Omega;
 * b) 9.254E-01 &Omega;
 * c) 1.018E+00 &Omega;
 * d) 1.120E+00 &Omega;
 * e) 1.232E+00 &Omega;

2) Calculate the resistance of a 12-gauge copper wire that is 45 m long and carries a current of 51 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 1.716E-01 &Omega;
 * b) 1.888E-01 &Omega;
 * c) 2.076E-01 &Omega;
 * d) 2.284E-01 &Omega;
 * e) 2.512E-01 &Omega;

3) Two sources of emf &epsilon;1=40.3 V, and  &epsilon;2=16.8 V are oriented as shownin the circuit. The resistances are R1=2.57 k&Omega; and  R2=2.25 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.96 mA and I4=0.752 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.825E+00 mA
 * b) 2.007E+00 mA
 * c) 2.208E+00 mA
 * d) 2.429E+00 mA
 * e) 2.672E+00 mA

4) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=8.29 V are oriented as shownin the circuit. The resistances are R1=3.43 k&Omega; and  R2=1.16 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.09 mA and I4=1.06 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 6.720E+00 V
 * b) 7.392E+00 V
 * c) 8.131E+00 V
 * d) 8.944E+00 V
 * e) 9.838E+00 V

5) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 2.77 x 10-5m/s
 * b) 3.36 x 10-5m/s
 * c) 4.06 x 10-5m/s
 * d) 4.92 x 10-5m/s
 * e) 5.97 x 10-5m/s

6) A 4 volt battery moves 19 Coulombs of charge in 1.3 hours. What is the power?


 * a) 1.62 x 10-2 W
 * b) 1.97 x 10-2 W
 * c) 2.38 x 10-2 W
 * d) 2.89 x 10-2 W
 * e) 3.5 x 10-2 W

7) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * a) $$R_1 = 125V$$ and $$R_2 = 125V$$.
 * b) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * c) None of these are true.
 * d) $$R_1 = 250V$$ and $$R_2 = 0V$$.

8) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{11}{7}\Omega$$.
 * b) $$\frac{10}{21}\Omega$$.
 * c) $$\frac{21}{10}\Omega$$.
 * d) $$\frac{7}{11}\Omega$$.

9) An ideal 8.8 V voltage source is connected to two resistors in parallel.  One is 0.8$$k\Omega$$, and the other is 2.9 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 1.56 mA.
 * b) 1.8 mA.
 * c) 2.07 mA.
 * d) 2.38 mA.
 * e) 2.74 mA.

10) A 8 ohm resistor is connected in series to a pair of 5.6 ohm resistors that are in parallel.  What is the net resistance?


 * a) 7.1 ohms.
 * b) 8.2 ohms.
 * c) 9.4 ohms.
 * d) 10.8 ohms.
 * e) 12.4 ohms.

T4 Y1
1) Two sources of emf &epsilon;1=52.7 V, and  &epsilon;2=17.5 V are oriented as shownin the circuit. The resistances are R1=5.86 k&Omega; and  R2=2.08 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.48 mA and I4=0.988 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 2.064E+01 V
 * b) 2.270E+01 V
 * c) 2.497E+01 V
 * d) 2.747E+01 V
 * e) 3.021E+01 V

2) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 6.1 ohms.
 * b) 7 ohms.
 * c) 8.1 ohms.
 * d) 9.3 ohms.
 * e) 10.7 ohms.

3) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{7}{11}\Omega$$.
 * b) $$\frac{11}{7}\Omega$$.
 * c) $$\frac{10}{21}\Omega$$.
 * d) $$\frac{21}{10}\Omega$$.

4) A DC winch moter draws 19 amps at 175 volts as it lifts a 4.230E+03 N weight at a constant speed of 0.483 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 3.551E+00 &Omega;
 * b) 3.906E+00 &Omega;
 * c) 4.297E+00 &Omega;
 * d) 4.726E+00 &Omega;
 * e) 5.199E+00 &Omega;

5) An ideal 9.2 V voltage source is connected to two resistors in parallel.  One is 1.1$$k\Omega$$, and the other is 2.4 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 2.29 mA.
 * b) 2.63 mA.
 * c) 3.02 mA.
 * d) 3.48 mA.
 * e) 4 mA.

6) Two sources of emf &epsilon;1=29.3 V, and  &epsilon;2=11.0 V are oriented as shownin the circuit. The resistances are R1=5.65 k&Omega; and  R2=2.68 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.81 mA and I4=0.525 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 1.717E+00 mA
 * b) 1.888E+00 mA
 * c) 2.077E+00 mA
 * d) 2.285E+00 mA
 * e) 2.514E+00 mA

7) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * a) $$R_1 = 250V$$ and $$R_2 = 0V$$.
 * b) None of these are true.
 * c) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * d) $$R_1 = 125V$$ and $$R_2 = 125V$$.

8) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * a) 4.14 x 10-2 W
 * b) 5.02 x 10-2 W
 * c) 6.08 x 10-2 W
 * d) 7.37 x 10-2 W
 * e) 8.93 x 10-2 W

9) Calculate the resistance of a 12-gauge copper wire that is 13 m long and carries a current of 22 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 4.957E-02 &Omega;
 * b) 5.453E-02 &Omega;
 * c) 5.998E-02 &Omega;
 * d) 6.598E-02 &Omega;
 * e) 7.258E-02 &Omega;

10) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 6.77 x 10-5m/s
 * b) 8.2 x 10-5m/s
 * c) 9.93 x 10-5m/s
 * d) 1.2 x 10-4m/s
 * e) 1.46 x 10-4m/s

T4 Y2
1) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=11.5 V are oriented as shownin the circuit. The resistances are R1=2.13 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.11 mA and I4=0.746 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 4.275E+00 V
 * b) 4.703E+00 V
 * c) 5.173E+00 V
 * d) 5.691E+00 V
 * e) 6.260E+00 V

2) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 1.47 mA.
 * b) 1.69 mA.
 * c) 1.94 mA.
 * d) 2.23 mA.
 * e) 2.57 mA.

3) A DC winch moter draws 26 amps at 153 volts as it lifts a 4.100E+03 N weight at a constant speed of 0.609 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * a) 2.191E+00 &Omega;
 * b) 2.410E+00 &Omega;
 * c) 2.651E+00 &Omega;
 * d) 2.916E+00 &Omega;
 * e) 3.208E+00 &Omega;

4) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * a) 4.43 x 10-2 W
 * b) 5.37 x 10-2 W
 * c) 6.51 x 10-2 W
 * d) 7.88 x 10-2 W
 * e) 9.55 x 10-2 W

5) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.82 x 10-4m/s
 * b) 4.63 x 10-4m/s
 * c) 5.61 x 10-4m/s
 * d) 6.8 x 10-4m/s
 * e) 8.24 x 10-4m/s

6) Calculate the resistance of a 12-gauge copper wire that is 15 m long and carries a current of 27 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * a) 5.200E-02 &Omega;
 * b) 5.720E-02 &Omega;
 * c) 6.292E-02 &Omega;
 * d) 6.921E-02 &Omega;
 * e) 7.613E-02 &Omega;

7) A 5.6 ohm resistor is connected in series to a pair of 7.2 ohm resistors that are in parallel.  What is the net resistance?


 * a) 7 ohms.
 * b) 8 ohms.
 * c) 9.2 ohms.
 * d) 10.6 ohms.
 * e) 12.2 ohms.

8) Two sources of emf &epsilon;1=36.3 V, and  &epsilon;2=12.9 V are oriented as shownin the circuit. The resistances are R1=4.28 k&Omega; and  R2=1.58 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.16 mA and I4=1.2 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * a) 2.224E+00 mA
 * b) 2.446E+00 mA
 * c) 2.691E+00 mA
 * d) 2.960E+00 mA
 * e) 3.256E+00 mA

9) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * a) $$\frac{7}{11}\Omega$$.
 * b) $$\frac{10}{21}\Omega$$.
 * c) $$\frac{11}{7}\Omega$$.
 * d) $$\frac{21}{10}\Omega$$.

10) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * a) None of these are true.
 * b) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * c) $$R_1 = 250V$$ and $$R_2 = 0V$$.
 * d) $$R_1 = 125V$$ and $$R_2 = 125V$$.

T4 Z0
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 5.73 &Omega; at a temperature of 99&deg;C and that the temperature coefficient of expansion is 5.260E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 420 &deg;C?


 * a) 1.267E+01 &Omega;
 * b) 1.331E+01 &Omega;
 * c) 1.397E+01 &Omega;
 * d) 1.467E+01 &Omega;
 * e) 1.540E+01 &Omega;

2) A device requires consumes 88 W of power and requires 11.3 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 1.467E+06 A/m2
 * b) 1.614E+06 A/m2
 * c) 1.775E+06 A/m2
 * d) 1.953E+06 A/m2
 * e) 2.148E+06 A/m2

3) In the circuit shown V=15.8 V, R1=1.86 &Omega;, R2=7.66 &Omega;, and R3=12.9 &Omega;. What is the power dissipated by R2?


 * a) 1.157E+01 W
 * b) 1.273E+01 W
 * c) 1.400E+01 W
 * d) 1.540E+01 W
 * e) 1.694E+01 W

4) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=8.29 V are oriented as shownin the circuit. The resistances are R1=3.43 k&Omega; and  R2=1.16 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.09 mA and I4=1.06 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 6.720E+00 V
 * b) 7.392E+00 V
 * c) 8.131E+00 V
 * d) 8.944E+00 V
 * e) 9.838E+00 V

5) A 130 Watt DC motor draws 0.3 amps of current. What is effective resistance?


 * a) 8.12 x 102 &Omega;
 * b) 9.84 x 102 &Omega;
 * c) 1.19 x 103 &Omega;
 * d) 1.44 x 103 &Omega;
 * e) 1.75 x 103 &Omega;

6) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 6.77 x 10-5m/s
 * b) 8.2 x 10-5m/s
 * c) 9.93 x 10-5m/s
 * d) 1.2 x 10-4m/s
 * e) 1.46 x 10-4m/s

7) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * a) 25 Joules
 * b) 3 Joules
 * c) None of these are true
 * d) 5 Joules

8) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * a) $$R_{Total} = 6\Omega$$.
 * b) None of these are true.
 * c) $$R_{Total} = 3\Omega$$.
 * d) $$R_{Total} = 0.5454\Omega$$.

9) A battery has an emf of 7 volts, and an internal resistance of 357 $$k\Omega$$. It is connected to a 2.9 $$M\Omega$$ resistor.  What power is developed in the 2.9  $$M\Omega$$ resistor?


 * a) 13.4 $$\mu$$W.
 * b) 15.4 $$\mu$$W.
 * c) 17.72 $$\mu$$W.
 * d) 20.37 $$\mu$$W.
 * e) 23.43 $$\mu$$W.

10) An ideal 9.9 V voltage source is connected to two resistors in parallel.  One is 0.9$$k\Omega$$, and the other is 1.8 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 3.67 mA.
 * b) 4.22 mA.
 * c) 4.85 mA.
 * d) 5.58 mA.
 * e) 6.41 mA.

T4 Z1
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 3.64 &Omega; at a temperature of 82&deg;C and that the temperature coefficient of expansion is 4.530E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 390 &deg;C?


 * a) 7.532E+00 &Omega;
 * b) 7.908E+00 &Omega;
 * c) 8.303E+00 &Omega;
 * d) 8.719E+00 &Omega;
 * e) 9.155E+00 &Omega;

2) A 130 Watt DC motor draws 0.3 amps of current. What is effective resistance?


 * a) 8.12 x 102 &Omega;
 * b) 9.84 x 102 &Omega;
 * c) 1.19 x 103 &Omega;
 * d) 1.44 x 103 &Omega;
 * e) 1.75 x 103 &Omega;

3) An ideal 8.9 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.4 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 1.37 mA.
 * b) 1.57 mA.
 * c) 1.81 mA.
 * d) 2.08 mA.
 * e) 2.39 mA.

4) A battery has an emf of 5.6 volts, and an internal resistance of 450 $$k\Omega$$. It is connected to a 2.7 $$M\Omega$$ resistor.  What power is developed in the 2.7  $$M\Omega$$ resistor?


 * a) 4.88 $$\mu$$W.
 * b) 5.61 $$\mu$$W.
 * c) 6.45 $$\mu$$W.
 * d) 7.42 $$\mu$$W.
 * e) 8.53 $$\mu$$W.

5) Two sources of emf &epsilon;1=16.8 V, and  &epsilon;2=7.15 V are oriented as shownin the circuit. The resistances are R1=3.12 k&Omega; and  R2=1.51 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.95 mA and I4=0.603 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 4.108E+00 V
 * b) 4.519E+00 V
 * c) 4.970E+00 V
 * d) 5.468E+00 V
 * e) 6.014E+00 V

6) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * a) None of these are true.
 * b) $$R_{Total} = 3\Omega$$.
 * c) $$R_{Total} = 6\Omega$$.
 * d) $$R_{Total} = 0.5454\Omega$$.

7) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * a) 3 Joules
 * b) 5 Joules
 * c) 25 Joules
 * d) None of these are true

8) The diameter of a copper wire is 9.2 mm, and it carries a current of 64 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 4.91 x 10-5m/s
 * b) 5.95 x 10-5m/s
 * c) 7.2 x 10-5m/s
 * d) 8.73 x 10-5m/s
 * e) 1.06 x 10-4m/s

9) A device requires consumes 166 W of power and requires 9.99 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 1.570E+06 A/m2
 * b) 1.727E+06 A/m2
 * c) 1.899E+06 A/m2
 * d) 2.089E+06 A/m2
 * e) 2.298E+06 A/m2

10) In the circuit shown V=11.8 V, R1=2.38 &Omega;, R2=5.11 &Omega;, and R3=14.6 &Omega;. What is the power dissipated by R2?


 * a) 8.489E+00 W
 * b) 9.338E+00 W
 * c) 1.027E+01 W
 * d) 1.130E+01 W
 * e) 1.243E+01 W

T4 Z2
1) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * a) $$R_{Total} = 3\Omega$$.
 * b) $$R_{Total} = 6\Omega$$.
 * c) None of these are true.
 * d) $$R_{Total} = 0.5454\Omega$$.

2) In the circuit shown V=16.2 V, R1=2.84 &Omega;, R2=7.06 &Omega;, and R3=13.1 &Omega;. What is the power dissipated by R2?


 * a) 1.418E+01 W
 * b) 1.560E+01 W
 * c) 1.716E+01 W
 * d) 1.887E+01 W
 * e) 2.076E+01 W

3) An ideal 3.6 V voltage source is connected to two resistors in parallel.  One is 2.2$$k\Omega$$, and the other is 4.2 $$k\Omega$$.  What is the current through the larger resistor?


 * a) 0.43 mA.
 * b) 0.49 mA.
 * c) 0.56 mA.
 * d) 0.65 mA.
 * e) 0.74 mA.

4) Imagine a substance could be made into a very hot filament. Suppose the resitance is 1.52 &Omega; at a temperature of 45&deg;C and that the temperature coefficient of expansion is 4.330E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 479 &deg;C?


 * a) 3.970E+00 &Omega;
 * b) 4.168E+00 &Omega;
 * c) 4.376E+00 &Omega;
 * d) 4.595E+00 &Omega;
 * e) 4.825E+00 &Omega;

5) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * a) 2.2 x 103 &Omega;
 * b) 2.67 x 103 &Omega;
 * c) 3.23 x 103 &Omega;
 * d) 3.91 x 103 &Omega;
 * e) 4.74 x 103 &Omega;

6) A battery has an emf of 5.6 volts, and an internal resistance of 460 $$k\Omega$$. It is connected to a 2.4 $$M\Omega$$ resistor.  What power is developed in the 2.4  $$M\Omega$$ resistor?


 * a) 6.05 $$\mu$$W.
 * b) 6.96 $$\mu$$W.
 * c) 8 $$\mu$$W.
 * d) 9.2 $$\mu$$W.
 * e) 10.58 $$\mu$$W.

7) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * a) 3.07 x 10-5m/s
 * b) 3.72 x 10-5m/s
 * c) 4.5 x 10-5m/s
 * d) 5.46 x 10-5m/s
 * e) 6.61 x 10-5m/s

8) A device requires consumes 196 W of power and requires 2.4 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * a) 4.563E+05 A/m2
 * b) 5.019E+05 A/m2
 * c) 5.521E+05 A/m2
 * d) 6.073E+05 A/m2
 * e) 6.680E+05 A/m2

9) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * a) 5 Joules
 * b) None of these are true
 * c) 25 Joules
 * d) 3 Joules

10) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=11.5 V are oriented as shownin the circuit. The resistances are R1=2.13 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.11 mA and I4=0.746 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * a) 4.275E+00 V
 * b) 4.703E+00 V
 * c) 5.173E+00 V
 * d) 5.691E+00 V
 * e) 6.260E+00 V


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Key: A0
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 2.61 &Omega; at a temperature of 92&deg;C and that the temperature coefficient of expansion is 4.260E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 422 &deg;C?


 * +a) 6.279E+00 &Omega;
 * -b) 6.593E+00 &Omega;
 * -c) 6.923E+00 &Omega;
 * -d) 7.269E+00 &Omega;
 * -e) 7.632E+00 &Omega;

2) What is the average current involved when a truck battery sets in motion 728 C of charge in 3.94 s while starting an engine?


 * +a) 1.848E+02 A
 * -b) 2.032E+02 A
 * -c) 2.236E+02 A
 * -d) 2.459E+02 A
 * -e) 2.705E+02 A

3) Two sources of emf &epsilon;1=13.6 V, and  &epsilon;2=6.53 V are oriented as shownin the circuit. The resistances are R1=2.89 k&Omega; and  R2=2.12 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.11 mA and I4=0.311 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 7.264E-01 mA
 * +b) 7.990E-01 mA
 * -c) 8.789E-01 mA
 * -d) 9.668E-01 mA
 * -e) 1.063E+00 mA

4) A given battery has a 11 V emf and an internal resistance of 0.0998 &Omega;. If it is connected to a 0.417 &Omega; resistor what is the power dissipated by that load?


 * -a) 1.419E+02 W
 * -b) 1.561E+02 W
 * -c) 1.717E+02 W
 * +d) 1.889E+02 W
 * -e) 2.078E+02 W

5) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.7 x 10-4m/s
 * -b) 3.27 x 10-4m/s
 * -c) 3.96 x 10-4m/s
 * -d) 4.79 x 10-4m/s
 * +e) 5.81 x 10-4m/s

6) A power supply delivers 138 watts of power to a 206 ohm resistor.  What was the applied voltage?


 * -a) 1.39 x 102 volts
 * +b) 1.69 x 102 volts
 * -c) 2.04 x 102 volts
 * -d) 2.47 x 102 volts
 * -e) 3 x 102 volts

7) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * -a) None of these are true
 * +b) 25 Joules
 * -c) 3 Joules
 * -d) 5 Joules

8) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * -a) None of these are true.
 * -b) It is not possible to connect that Number of Resistors in parallel.
 * +c) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * -d) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity

9) An ideal 8.8 V voltage source is connected to two resistors in parallel.  One is 0.8$$k\Omega$$, and the other is 2.9 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 1.56 mA.
 * -b) 1.8 mA.
 * -c) 2.07 mA.
 * +d) 2.38 mA.
 * -e) 2.74 mA.

10) A battery has an emf of 5.3 volts, and an internal resistance of 428 $$k\Omega$$. It is connected to a 2.3 $$M\Omega$$ resistor.  What power is developed in the 2.3  $$M\Omega$$ resistor?


 * -a) 4.96 $$\mu$$W.
 * -b) 5.71 $$\mu$$W.
 * -c) 6.56 $$\mu$$W.
 * -d) 7.55 $$\mu$$W.
 * +e) 8.68 $$\mu$$W.

Key: A1
1) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * +a) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * -b) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity
 * -c) It is not possible to connect that Number of Resistors in parallel.
 * -d) None of these are true.

2) A given battery has a 13 V emf and an internal resistance of 0.159 &Omega;. If it is connected to a 0.617 &Omega; resistor what is the power dissipated by that load?


 * -a) 1.301E+02 W
 * -b) 1.431E+02 W
 * -c) 1.574E+02 W
 * +d) 1.732E+02 W
 * -e) 1.905E+02 W

3) An ideal 5.6 V voltage source is connected to two resistors in parallel.  One is 2.3$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.56 mA.
 * -b) 0.64 mA.
 * -c) 0.74 mA.
 * +d) 0.85 mA.
 * -e) 0.98 mA.

4) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * +a) 25 Joules
 * -b) 3 Joules
 * -c) 5 Joules
 * -d) None of these are true

5) Imagine a substance could be made into a very hot filament. Suppose the resitance is 4.48 &Omega; at a temperature of 56&deg;C and that the temperature coefficient of expansion is 4.550E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 449 &deg;C?


 * -a) 1.028E+01 &Omega;
 * -b) 1.079E+01 &Omega;
 * -c) 1.133E+01 &Omega;
 * -d) 1.190E+01 &Omega;
 * +e) 1.249E+01 &Omega;

6) Two sources of emf &epsilon;1=20.6 V, and  &epsilon;2=9.53 V are oriented as shownin the circuit. The resistances are R1=5.46 k&Omega; and  R2=2.55 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.5 mA and I4=0.415 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * +a) 1.085E+00 mA
 * -b) 1.194E+00 mA
 * -c) 1.313E+00 mA
 * -d) 1.444E+00 mA
 * -e) 1.589E+00 mA

7) A power supply delivers 138 watts of power to a 206 ohm resistor.  What was the applied voltage?


 * -a) 1.39 x 102 volts
 * +b) 1.69 x 102 volts
 * -c) 2.04 x 102 volts
 * -d) 2.47 x 102 volts
 * -e) 3 x 102 volts

8) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 6.77 x 10-5m/s
 * -b) 8.2 x 10-5m/s
 * -c) 9.93 x 10-5m/s
 * +d) 1.2 x 10-4m/s
 * -e) 1.46 x 10-4m/s

9) A battery has an emf of 7 volts, and an internal resistance of 357 $$k\Omega$$. It is connected to a 2.9 $$M\Omega$$ resistor.  What power is developed in the 2.9  $$M\Omega$$ resistor?


 * +a) 13.4 $$\mu$$W.
 * -b) 15.4 $$\mu$$W.
 * -c) 17.72 $$\mu$$W.
 * -d) 20.37 $$\mu$$W.
 * -e) 23.43 $$\mu$$W.

10) What is the average current involved when a truck battery sets in motion 669 C of charge in 4.3 s while starting an engine?


 * -a) 1.063E+02 A
 * -b) 1.169E+02 A
 * -c) 1.286E+02 A
 * -d) 1.414E+02 A
 * +e) 1.556E+02 A

Key: A2
1) Two sources of emf &epsilon;1=29.5 V, and  &epsilon;2=11.0 V are oriented as shownin the circuit. The resistances are R1=2.45 k&Omega; and  R2=1.96 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.03 mA and I4=0.783 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * +a) 2.247E+00 mA
 * -b) 2.472E+00 mA
 * -c) 2.719E+00 mA
 * -d) 2.991E+00 mA
 * -e) 3.290E+00 mA

2) Imagine a substance could be made into a very hot filament. Suppose the resitance is 6.06 &Omega; at a temperature of 80&deg;C and that the temperature coefficient of expansion is 4.290E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 330 &deg;C?


 * -a) 1.196E+01 &Omega;
 * +b) 1.256E+01 &Omega;
 * -c) 1.319E+01 &Omega;
 * -d) 1.385E+01 &Omega;
 * -e) 1.454E+01 &Omega;

3) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.24 x 10-5m/s
 * -b) 2.72 x 10-5m/s
 * -c) 3.29 x 10-5m/s
 * +d) 3.99 x 10-5m/s
 * -e) 4.83 x 10-5m/s

4) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * -a) 8.42 x 101 volts
 * -b) 1.02 x 102 volts
 * -c) 1.24 x 102 volts
 * -d) 1.5 x 102 volts
 * +e) 1.81 x 102 volts

5) A given battery has a 12 V emf and an internal resistance of 0.0984 &Omega;. If it is connected to a 0.485 &Omega; resistor what is the power dissipated by that load?


 * +a) 2.052E+02 W
 * -b) 2.257E+02 W
 * -c) 2.483E+02 W
 * -d) 2.731E+02 W
 * -e) 3.004E+02 W

6) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * -a) 3 Joules
 * -b) 5 Joules
 * -c) None of these are true
 * +d) 25 Joules

7) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * -a) 7.09 $$\mu$$W.
 * -b) 8.16 $$\mu$$W.
 * +c) 9.38 $$\mu$$W.
 * -d) 10.79 $$\mu$$W.
 * -e) 12.41 $$\mu$$W.

8) An ideal 9.2 V voltage source is connected to two resistors in parallel.  One is 1.1$$k\Omega$$, and the other is 2.4 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 2.29 mA.
 * +b) 2.63 mA.
 * -c) 3.02 mA.
 * -d) 3.48 mA.
 * -e) 4 mA.

9) What is the average current involved when a truck battery sets in motion 682 C of charge in 5.29 s while starting an engine?


 * -a) 1.065E+02 A
 * -b) 1.172E+02 A
 * +c) 1.289E+02 A
 * -d) 1.418E+02 A
 * -e) 1.560E+02 A

10) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * -a) None of these are true.
 * -b) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity
 * +c) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * -d) It is not possible to connect that Number of Resistors in parallel.

Key: B0
1) A device requires consumes 156 W of power and requires 5.42 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * -a) 7.742E+05 A/m2
 * -b) 8.516E+05 A/m2
 * -c) 9.367E+05 A/m2
 * +d) 1.030E+06 A/m2
 * -e) 1.133E+06 A/m2

2) What is consumer cost to operate one 102&minus;W incandescent bulb for 5 hours per day for 1 year (365 days) if the cost of electricity is $0.149 per kilowatt-hour?


 * -a) $2.292E+01
 * -b) $2.521E+01
 * +c) $2.774E+01
 * -d) $3.051E+01
 * -e) $3.356E+01

3) Two sources of emf &epsilon;1=18.6 V, and  &epsilon;2=5.63 V are oriented as shownin the circuit. The resistances are R1=3.9 k&Omega; and  R2=1.1 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.41 mA and I4=0.614 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * -a) 4.342E+00 V
 * -b) 4.776E+00 V
 * -c) 5.254E+00 V
 * +d) 5.779E+00 V
 * -e) 6.357E+00 V

4) Two sources of emf &epsilon;1=52.7 V, and  &epsilon;2=17.5 V are oriented as shownin the circuit. The resistances are R1=5.86 k&Omega; and  R2=2.08 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.48 mA and I4=0.988 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * +a) 2.064E+01 V
 * -b) 2.270E+01 V
 * -c) 2.497E+01 V
 * -d) 2.747E+01 V
 * -e) 3.021E+01 V

5) A power supply delivers 187 watts of power to a 287 ohm resistor.  What was the applied voltage?


 * +a) 2.32 x 102 volts
 * -b) 2.81 x 102 volts
 * -c) 3.4 x 102 volts
 * -d) 4.12 x 102 volts
 * -e) 4.99 x 102 volts

6) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * +a) 7.74 x 102 &Omega;
 * -b) 9.38 x 102 &Omega;
 * -c) 1.14 x 103 &Omega;
 * -d) 1.38 x 103 &Omega;
 * -e) 1.67 x 103 &Omega;

7) 3 amps flow through a 1 Ohm resistor. What is the voltage?
 * -a) $$1V$$
 * -b) None these are correct.
 * +c) $$3V$$
 * -d) $$\frac{1}{3}V$$

8) What is the current through R1, R2, R3, and R4 in the figure shown?
 * -a) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * -b) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * +c) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * -d) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..

9) An ideal 6 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 25$$m\Omega$$ is used.  What current does the ammeter actually read?


 * +a) 70.6 A.
 * -b) 81.2 A.
 * -c) 93.4 A.
 * -d) 107.4 A.
 * -e) 123.5 A.

10) Two 7.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.8 ohm resistor.  What is the net resistance?


 * -a) 5.7 ohms.
 * +b) 6.5 ohms.
 * -c) 7.5 ohms.
 * -d) 8.6 ohms.
 * -e) 9.9 ohms.

Key: B1
1) Two sources of emf &epsilon;1=46.1 V, and  &epsilon;2=16.2 V are oriented as shownin the circuit. The resistances are R1=5.17 k&Omega; and  R2=2.06 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.97 mA and I4=1.07 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * -a) 1.309E+01 V
 * -b) 1.440E+01 V
 * +c) 1.584E+01 V
 * -d) 1.742E+01 V
 * -e) 1.917E+01 V

2) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * -a) 8.42 x 101 volts
 * -b) 1.02 x 102 volts
 * -c) 1.24 x 102 volts
 * -d) 1.5 x 102 volts
 * +e) 1.81 x 102 volts

3) 3 amps flow through a 1 Ohm resistor. What is the voltage?
 * -a) $$\frac{1}{3}V$$
 * -b) None these are correct.
 * -c) $$1V$$
 * +d) $$3V$$

4) A device requires consumes 168 W of power and requires 11.0 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * -a) 1.901E+06 A/m2
 * +b) 2.091E+06 A/m2
 * -c) 2.300E+06 A/m2
 * -d) 2.530E+06 A/m2
 * -e) 2.783E+06 A/m2

5) Two 7.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.8 ohm resistor.  What is the net resistance?


 * -a) 5.7 ohms.
 * +b) 6.5 ohms.
 * -c) 7.5 ohms.
 * -d) 8.6 ohms.
 * -e) 9.9 ohms.

6) A 196 Watt DC motor draws 0.35 amps of current. What is effective resistance?


 * +a) 1.6 x 103 &Omega;
 * -b) 1.94 x 103 &Omega;
 * -c) 2.35 x 103 &Omega;
 * -d) 2.85 x 103 &Omega;
 * -e) 3.45 x 103 &Omega;

7) What is the current through R1, R2, R3, and R4 in the figure shown?
 * -a) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * -b) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..
 * +c) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * -d) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.

8) What is consumer cost to operate one 105&minus;W incandescent bulb for 11 hours per day for 1 year (365 days) if the cost of electricity is $0.131 per kilowatt-hour?


 * -a) $5.021E+01
 * +b) $5.523E+01
 * -c) $6.075E+01
 * -d) $6.682E+01
 * -e) $7.351E+01

9) Two sources of emf &epsilon;1=52.7 V, and  &epsilon;2=17.5 V are oriented as shownin the circuit. The resistances are R1=5.86 k&Omega; and  R2=2.08 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.48 mA and I4=0.988 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * +a) 2.064E+01 V
 * -b) 2.270E+01 V
 * -c) 2.497E+01 V
 * -d) 2.747E+01 V
 * -e) 3.021E+01 V

10) An ideal 6 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 25$$m\Omega$$ is used.  What current does the ammeter actually read?


 * +a) 70.6 A.
 * -b) 81.2 A.
 * -c) 93.4 A.
 * -d) 107.4 A.
 * -e) 123.5 A.

Key: B2
1) What is the current through R1, R2, R3, and R4 in the figure shown?
 * -a) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..
 * -b) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * +c) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * -d) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.

2) What is consumer cost to operate one 77&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.124 per kilowatt-hour?


 * -a) $3.142E+01
 * -b) $3.456E+01
 * -c) $3.802E+01
 * +d) $4.182E+01
 * -e) $4.600E+01

3) A power supply delivers 101 watts of power to a 219 ohm resistor.  What was the applied voltage?


 * +a) 1.49 x 102 volts
 * -b) 1.8 x 102 volts
 * -c) 2.18 x 102 volts
 * -d) 2.64 x 102 volts
 * -e) 3.2 x 102 volts

4) 3 amps flow through a 1 Ohm resistor. What is the voltage?
 * +a) $$3V$$
 * -b) $$\frac{1}{3}V$$
 * -c) $$1V$$
 * -d) None these are correct.

5) An ideal 7.5 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 19$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 54.3 A.
 * -b) 62.4 A.
 * -c) 71.8 A.
 * -d) 82.6 A.
 * +e) 94.9 A.

6) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * +a) 6.5 ohms.
 * -b) 7.5 ohms.
 * -c) 8.6 ohms.
 * -d) 9.9 ohms.
 * -e) 11.4 ohms.

7) A 195 Watt DC motor draws 0.49 amps of current. What is effective resistance?


 * +a) 8.12 x 102 &Omega;
 * -b) 9.84 x 102 &Omega;
 * -c) 1.19 x 103 &Omega;
 * -d) 1.44 x 103 &Omega;
 * -e) 1.75 x 103 &Omega;

8) Two sources of emf &epsilon;1=38.8 V, and  &epsilon;2=14.9 V are oriented as shownin the circuit. The resistances are R1=5.83 k&Omega; and  R2=1.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.57 mA and I4=1.19 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 1.013E+01 V
 * -b) 1.115E+01 V
 * -c) 1.226E+01 V
 * +d) 1.349E+01 V
 * -e) 1.484E+01 V

9) Two sources of emf &epsilon;1=39.4 V, and  &epsilon;2=12.2 V are oriented as shownin the circuit. The resistances are R1=3.84 k&Omega; and  R2=2.01 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.71 mA and I4=0.669 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * -a) 8.825E+00 V
 * -b) 9.708E+00 V
 * -c) 1.068E+01 V
 * -d) 1.175E+01 V
 * +e) 1.292E+01 V

10) A device requires consumes 126 W of power and requires 1.11 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * +a) 2.110E+05 A/m2
 * -b) 2.321E+05 A/m2
 * -c) 2.553E+05 A/m2
 * -d) 2.809E+05 A/m2
 * -e) 3.090E+05 A/m2

Key: C0
1) A make-believe metal has a density of 6.650E+03 kg/m3 and an atomic mass of 67.5 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * -a) 4.456E+28 e&minus;/m3
 * -b) 4.901E+28 e&minus;/m3
 * -c) 5.392E+28 e&minus;/m3
 * +d) 5.931E+28 e&minus;/m3
 * -e) 6.524E+28 e&minus;/m3

2) Calculate the resistance of a 12-gauge copper wire that is 11 m long and carries a current of 94 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 3.813E-02 &Omega;
 * -b) 4.195E-02 &Omega;
 * -c) 4.614E-02 &Omega;
 * -d) 5.076E-02 &Omega;
 * +e) 5.583E-02 &Omega;

3) Two sources of emf &epsilon;1=30.5 V, and  &epsilon;2=12.0 V are oriented as shownin the circuit. The resistances are R1=3.79 k&Omega; and  R2=1.86 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.07 mA and I4=0.73 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 2.281E+00 mA
 * -b) 2.509E+00 mA
 * -c) 2.760E+00 mA
 * -d) 3.036E+00 mA
 * +e) 3.340E+00 mA

4) In the circuit shown V=15.2 V, R1=1.6 &Omega;, R2=7.89 &Omega;, and R3=15.3 &Omega;. What is the power dissipated by R2?


 * +a) 1.713E+01 W
 * -b) 1.885E+01 W
 * -c) 2.073E+01 W
 * -d) 2.280E+01 W
 * -e) 2.508E+01 W

5) A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?


 * +a) 4.06 x 10-2 W
 * -b) 4.92 x 10-2 W
 * -c) 5.96 x 10-2 W
 * -d) 7.22 x 10-2 W
 * -e) 8.75 x 10-2 W

6) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.24 x 10-5m/s
 * -b) 2.72 x 10-5m/s
 * -c) 3.29 x 10-5m/s
 * +d) 3.99 x 10-5m/s
 * -e) 4.83 x 10-5m/s

7) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * +a) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * -b) None of these are true.
 * -c) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity
 * -d) It is not possible to connect that Number of Resistors in parallel.

8) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * +a) I = 5A &  P = 25W.
 * -b) I = 5A &  P = 9W
 * -c) I = 5A &  P = 5W.
 * -d) I = 5A &  P = 3W.

9) An ideal 7.9 V voltage source is connected to two resistors in parallel.  One is 2.4$$k\Omega$$, and the other is 5.2 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.68 mA.
 * -b) 0.79 mA.
 * -c) 0.9 mA.
 * +d) 1.04 mA.
 * -e) 1.2 mA.

10) A battery has an emf of 5.3 volts, and an internal resistance of 428 $$k\Omega$$. It is connected to a 2.3 $$M\Omega$$ resistor.  What power is developed in the 2.3  $$M\Omega$$ resistor?


 * -a) 4.96 $$\mu$$W.
 * -b) 5.71 $$\mu$$W.
 * -c) 6.56 $$\mu$$W.
 * -d) 7.55 $$\mu$$W.
 * +e) 8.68 $$\mu$$W.

Key: C1
1) An ideal 5.2 V voltage source is connected to two resistors in parallel.  One is 1.2$$k\Omega$$, and the other is 3.6 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.94 mA.
 * +b) 1.08 mA.
 * -c) 1.25 mA.
 * -d) 1.43 mA.
 * -e) 1.65 mA.

2) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * -a) 7.09 $$\mu$$W.
 * -b) 8.16 $$\mu$$W.
 * +c) 9.38 $$\mu$$W.
 * -d) 10.79 $$\mu$$W.
 * -e) 12.41 $$\mu$$W.

3) In the circuit shown V=16.1 V, R1=1.18 &Omega;, R2=5.28 &Omega;, and R3=14.8 &Omega;. What is the power dissipated by R2?


 * -a) 2.172E+01 W
 * -b) 2.389E+01 W
 * -c) 2.628E+01 W
 * +d) 2.891E+01 W
 * -e) 3.180E+01 W

4) A make-believe metal has a density of 1.480E+04 kg/m3 and an atomic mass of 73.3 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * -a) 1.105E+29 e&minus;/m3
 * +b) 1.215E+29 e&minus;/m3
 * -c) 1.337E+29 e&minus;/m3
 * -d) 1.471E+29 e&minus;/m3
 * -e) 1.618E+29 e&minus;/m3

5) Two sources of emf &epsilon;1=13.6 V, and  &epsilon;2=6.53 V are oriented as shownin the circuit. The resistances are R1=2.89 k&Omega; and  R2=2.12 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.11 mA and I4=0.311 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 7.264E-01 mA
 * +b) 7.990E-01 mA
 * -c) 8.789E-01 mA
 * -d) 9.668E-01 mA
 * -e) 1.063E+00 mA

6) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * +a) I = 5A &  P = 25W.
 * -b) I = 5A &  P = 5W.
 * -c) I = 5A &  P = 3W.
 * -d) I = 5A &  P = 9W

7) The diameter of a copper wire is 9.2 mm, and it carries a current of 64 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 4.91 x 10-5m/s
 * -b) 5.95 x 10-5m/s
 * +c) 7.2 x 10-5m/s
 * -d) 8.73 x 10-5m/s
 * -e) 1.06 x 10-4m/s

8) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * -a) 7.85 x 10-3 W
 * -b) 9.51 x 10-3 W
 * -c) 1.15 x 10-2 W
 * -d) 1.4 x 10-2 W
 * +e) 1.69 x 10-2 W

9) Calculate the resistance of a 12-gauge copper wire that is 48 m long and carries a current of 50 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 2.215E-01 &Omega;
 * +b) 2.436E-01 &Omega;
 * -c) 2.680E-01 &Omega;
 * -d) 2.948E-01 &Omega;
 * -e) 3.243E-01 &Omega;

10) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * -a) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity
 * -b) It is not possible to connect that Number of Resistors in parallel.
 * -c) None of these are true.
 * +d) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.

Key: C2
1) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * -a) It is not possible to connect that Number of Resistors in parallel.
 * +b) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * -c) None of these are true.
 * -d) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity

2) In the circuit shown V=13.5 V, R1=2.66 &Omega;, R2=7.29 &Omega;, and R3=14.5 &Omega;. What is the power dissipated by R2?


 * -a) 7.123E+00 W
 * -b) 7.835E+00 W
 * -c) 8.618E+00 W
 * -d) 9.480E+00 W
 * +e) 1.043E+01 W

3) A 4 volt battery moves 19 Coulombs of charge in 1.3 hours. What is the power?


 * +a) 1.62 x 10-2 W
 * -b) 1.97 x 10-2 W
 * -c) 2.38 x 10-2 W
 * -d) 2.89 x 10-2 W
 * -e) 3.5 x 10-2 W

4) Calculate the resistance of a 12-gauge copper wire that is 52 m long and carries a current of 99 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 1.983E-01 &Omega;
 * -b) 2.181E-01 &Omega;
 * -c) 2.399E-01 &Omega;
 * +d) 2.639E-01 &Omega;
 * -e) 2.903E-01 &Omega;

5) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * -a) I = 5A &  P = 3W.
 * -b) I = 5A &  P = 9W
 * +c) I = 5A &  P = 25W.
 * -d) I = 5A &  P = 5W.

6) Two sources of emf &epsilon;1=43.0 V, and  &epsilon;2=13.8 V are oriented as shownin the circuit. The resistances are R1=3.97 k&Omega; and  R2=1.12 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=6.25 mA and I4=1.82 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 3.661E+00 mA
 * -b) 4.027E+00 mA
 * +c) 4.430E+00 mA
 * -d) 4.873E+00 mA
 * -e) 5.360E+00 mA

7) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.7 x 10-4m/s
 * -b) 3.27 x 10-4m/s
 * -c) 3.96 x 10-4m/s
 * -d) 4.79 x 10-4m/s
 * +e) 5.81 x 10-4m/s

8) A battery has an emf of 5.5 volts, and an internal resistance of 296 $$k\Omega$$. It is connected to a 3.3 $$M\Omega$$ resistor.  What power is developed in the 3.3  $$M\Omega$$ resistor?


 * +a) 7.72 $$\mu$$W.
 * -b) 8.88 $$\mu$$W.
 * -c) 10.21 $$\mu$$W.
 * -d) 11.74 $$\mu$$W.
 * -e) 13.5 $$\mu$$W.

9) A make-believe metal has a density of 6.650E+03 kg/m3 and an atomic mass of 67.5 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * -a) 4.456E+28 e&minus;/m3
 * -b) 4.901E+28 e&minus;/m3
 * -c) 5.392E+28 e&minus;/m3
 * +d) 5.931E+28 e&minus;/m3
 * -e) 6.524E+28 e&minus;/m3

10) An ideal 4.2 V voltage source is connected to two resistors in parallel.  One is 1.6$$k\Omega$$, and the other is 2.1 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.75 mA.
 * -b) 0.86 mA.
 * -c) 0.99 mA.
 * +d) 1.14 mA.
 * -e) 1.31 mA.

Key: D0
1) A device requires consumes 168 W of power and requires 11.0 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * -a) 1.901E+06 A/m2
 * +b) 2.091E+06 A/m2
 * -c) 2.300E+06 A/m2
 * -d) 2.530E+06 A/m2
 * -e) 2.783E+06 A/m2

2) What is the average current involved when a truck battery sets in motion 889 C of charge in 3.64 s while starting an engine?


 * +a) 2.442E+02 A
 * -b) 2.687E+02 A
 * -c) 2.955E+02 A
 * -d) 3.251E+02 A
 * -e) 3.576E+02 A

3) Three resistors, R1 = 1.2 &Omega;, and R2 = R2 = 2.75 &Omega;, are connected in parallel to a 6.42 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 2.581E+01 W
 * -b) 2.839E+01 W
 * -c) 3.122E+01 W
 * +d) 3.435E+01 W
 * -e) 3.778E+01 W

4) A battery with a terminal voltage of 10.6 V is connected to a circuit consisting of 2 21.1 &Omega; resistors and one 12.8 &Omega; resistor. What is the voltage drop across the 12.8 &Omega; resistor?


 * +a) 2.467E+00 V
 * -b) 2.714E+00 V
 * -c) 2.985E+00 V
 * -d) 3.283E+00 V
 * -e) 3.612E+00 V

5) A 5.8 volt battery moves 95 Coulombs of charge in 0.3 hours. What is the power?


 * -a) 4.21 x 10-1 W
 * +b) 5.1 x 10-1 W
 * -c) 6.18 x 10-1 W
 * -d) 7.49 x 10-1 W
 * -e) 9.07 x 10-1 W

6) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * -a) 5.42 x 102 &Omega;
 * -b) 6.57 x 102 &Omega;
 * -c) 7.95 x 102 &Omega;
 * +d) 9.64 x 102 &Omega;
 * -e) 1.17 x 103 &Omega;

7) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * -a) 2.2W
 * -b) 3W
 * +c) 24W
 * -d) 8W

8) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * +a) $$\frac{10}{7}\Omega$$.
 * -b) $$\frac{7}{10}\Omega$$.
 * -c) $$\frac{6}{10}\Omega$$.
 * -d) $$\frac{10}{6}\Omega$$.

9) An ideal 3.6 V voltage source is connected to two resistors in parallel.  One is 2.2$$k\Omega$$, and the other is 4.2 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.43 mA.
 * -b) 0.49 mA.
 * +c) 0.56 mA.
 * -d) 0.65 mA.
 * -e) 0.74 mA.

10) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.1 ohms.
 * -b) 7 ohms.
 * -c) 8.1 ohms.
 * -d) 9.3 ohms.
 * +e) 10.7 ohms.

Key: D1
1) What is the average current involved when a truck battery sets in motion 559 C of charge in 4.13 s while starting an engine?


 * -a) 9.245E+01 A
 * -b) 1.017E+02 A
 * -c) 1.119E+02 A
 * -d) 1.230E+02 A
 * +e) 1.354E+02 A

2) A battery with a terminal voltage of 13.2 V is connected to a circuit consisting of 3 15.7 &Omega; resistors and one 10.3 &Omega; resistor. What is the voltage drop across the 10.3 &Omega; resistor?


 * -a) 1.958E+00 V
 * -b) 2.153E+00 V
 * +c) 2.369E+00 V
 * -d) 2.606E+00 V
 * -e) 2.866E+00 V

3) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * -a) 5.42 x 102 &Omega;
 * -b) 6.57 x 102 &Omega;
 * -c) 7.95 x 102 &Omega;
 * +d) 9.64 x 102 &Omega;
 * -e) 1.17 x 103 &Omega;

4) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * +a) 4.43 x 10-2 W
 * -b) 5.37 x 10-2 W
 * -c) 6.51 x 10-2 W
 * -d) 7.88 x 10-2 W
 * -e) 9.55 x 10-2 W

5) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * +a) 1.47 mA.
 * -b) 1.69 mA.
 * -c) 1.94 mA.
 * -d) 2.23 mA.
 * -e) 2.57 mA.

6) Three resistors, R1 = 1.25 &Omega;, and R2 = R2 = 2.82 &Omega;, are connected in parallel to a 8.6 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 4.890E+01 W
 * -b) 5.379E+01 W
 * +c) 5.917E+01 W
 * -d) 6.508E+01 W
 * -e) 7.159E+01 W

7) A 6.6 ohm resistor is connected in series to a pair of 6.4 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.4 ohms.
 * -b) 7.4 ohms.
 * -c) 8.5 ohms.
 * +d) 9.8 ohms.
 * -e) 11.3 ohms.

8) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * +a) $$\frac{10}{7}\Omega$$.
 * -b) $$\frac{10}{6}\Omega$$.
 * -c) $$\frac{6}{10}\Omega$$.
 * -d) $$\frac{7}{10}\Omega$$.

9) A device requires consumes 196 W of power and requires 2.4 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * +a) 4.563E+05 A/m2
 * -b) 5.019E+05 A/m2
 * -c) 5.521E+05 A/m2
 * -d) 6.073E+05 A/m2
 * -e) 6.680E+05 A/m2

10) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * -a) 2.2W
 * -b) 3W
 * -c) 8W
 * +d) 24W

Key: D2
1) A 6.6 ohm resistor is connected in series to a pair of 6.4 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.4 ohms.
 * -b) 7.4 ohms.
 * -c) 8.5 ohms.
 * +d) 9.8 ohms.
 * -e) 11.3 ohms.

2) A device requires consumes 166 W of power and requires 9.99 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * -a) 1.570E+06 A/m2
 * -b) 1.727E+06 A/m2
 * +c) 1.899E+06 A/m2
 * -d) 2.089E+06 A/m2
 * -e) 2.298E+06 A/m2

3) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{6}{10}\Omega$$.
 * +b) $$\frac{10}{7}\Omega$$.
 * -c) $$\frac{7}{10}\Omega$$.
 * -d) $$\frac{10}{6}\Omega$$.

4) What is the average current involved when a truck battery sets in motion 546 C of charge in 3.7 s while starting an engine?


 * -a) 1.220E+02 A
 * -b) 1.342E+02 A
 * +c) 1.476E+02 A
 * -d) 1.623E+02 A
 * -e) 1.786E+02 A

5) An ideal 5.6 V voltage source is connected to two resistors in parallel.  One is 2.3$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.56 mA.
 * -b) 0.64 mA.
 * -c) 0.74 mA.
 * +d) 0.85 mA.
 * -e) 0.98 mA.

6) Three resistors, R1 = 1.74 &Omega;, and R2 = R2 = 3.92 &Omega;, are connected in parallel to a 8.5 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 2.836E+01 W
 * -b) 3.120E+01 W
 * -c) 3.432E+01 W
 * -d) 3.775E+01 W
 * +e) 4.152E+01 W

7) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * -a) 2.2W
 * +b) 24W
 * -c) 3W
 * -d) 8W

8) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * -a) 2.61 x 10-2 W
 * -b) 3.16 x 10-2 W
 * +c) 3.83 x 10-2 W
 * -d) 4.64 x 10-2 W
 * -e) 5.62 x 10-2 W

9) A 196 Watt DC motor draws 0.35 amps of current. What is effective resistance?


 * +a) 1.6 x 103 &Omega;
 * -b) 1.94 x 103 &Omega;
 * -c) 2.35 x 103 &Omega;
 * -d) 2.85 x 103 &Omega;
 * -e) 3.45 x 103 &Omega;

10) A battery with a terminal voltage of 8.41 V is connected to a circuit consisting of 3 16.1 &Omega; resistors and one 10.9 &Omega; resistor. What is the voltage drop across the 10.9 &Omega; resistor?


 * -a) 1.058E+00 V
 * -b) 1.163E+00 V
 * -c) 1.280E+00 V
 * -d) 1.408E+00 V
 * +e) 1.548E+00 V

Key: E0
1) What is consumer cost to operate one 102&minus;W incandescent bulb for 5 hours per day for 1 year (365 days) if the cost of electricity is $0.149 per kilowatt-hour?


 * -a) $2.292E+01
 * -b) $2.521E+01
 * +c) $2.774E+01
 * -d) $3.051E+01
 * -e) $3.356E+01

2) What is the average current involved when a truck battery sets in motion 760 C of charge in 5.35 s while starting an engine?


 * -a) 1.291E+02 A
 * +b) 1.421E+02 A
 * -c) 1.563E+02 A
 * -d) 1.719E+02 A
 * -e) 1.891E+02 A

3) Three resistors, R1 = 0.61 &Omega;, and R2 = R2 = 1.35 &Omega;, are connected in parallel to a 7.04 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 7.386E+01 W
 * +b) 8.125E+01 W
 * -c) 8.937E+01 W
 * -d) 9.831E+01 W
 * -e) 1.081E+02 W

4) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 467 V.  If the combined external and internal resistance is 172 &Omega and the capacitance is  74 mF, how long will it take for the capacitor's voltage to reach 258.0 V?


 * -a) 7.688E+00 s
 * -b) 8.457E+00 s
 * -c) 9.303E+00 s
 * +d) 1.023E+01 s
 * -e) 1.126E+01 s

5) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * -a) 4.14 x 10-2 W
 * +b) 5.02 x 10-2 W
 * -c) 6.08 x 10-2 W
 * -d) 7.37 x 10-2 W
 * -e) 8.93 x 10-2 W

6) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 2.77 x 10-5m/s
 * -b) 3.36 x 10-5m/s
 * -c) 4.06 x 10-5m/s
 * -d) 4.92 x 10-5m/s
 * -e) 5.97 x 10-5m/s

7) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * -a) None of these are ture.
 * -b) 2.5 Watts
 * +c) 1.67 Watts
 * -d) 11.67 Joules

8) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * +a) $$2.5\Omega.$$
 * -b) $$4.5\Omega.$$
 * -c) $$3.5\Omega.$$
 * -d) None of these are true.

9) An ideal 4.2 V voltage source is connected to two resistors in parallel.  One is 1.6$$k\Omega$$, and the other is 2.1 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.75 mA.
 * -b) 0.86 mA.
 * -c) 0.99 mA.
 * +d) 1.14 mA.
 * -e) 1.31 mA.

10) A battery has an emf of 7.8 volts, and an internal resistance of 351 $$k\Omega$$. It is connected to a 4.2 $$M\Omega$$ resistor.  What power is developed in the 4.2  $$M\Omega$$ resistor?


 * +a) 12.34 $$\mu$$W.
 * -b) 14.19 $$\mu$$W.
 * -c) 16.32 $$\mu$$W.
 * -d) 18.76 $$\mu$$W.
 * -e) 21.58 $$\mu$$W.

Key: E1
1) A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?


 * +a) 4.06 x 10-2 W
 * -b) 4.92 x 10-2 W
 * -c) 5.96 x 10-2 W
 * -d) 7.22 x 10-2 W
 * -e) 8.75 x 10-2 W

2) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) None of these are true.
 * -b) $$3.5\Omega.$$
 * +c) $$2.5\Omega.$$
 * -d) $$4.5\Omega.$$

3) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 3.07 x 10-5m/s
 * -b) 3.72 x 10-5m/s
 * -c) 4.5 x 10-5m/s
 * -d) 5.46 x 10-5m/s
 * +e) 6.61 x 10-5m/s

4) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * -a) 7.09 $$\mu$$W.
 * -b) 8.16 $$\mu$$W.
 * +c) 9.38 $$\mu$$W.
 * -d) 10.79 $$\mu$$W.
 * -e) 12.41 $$\mu$$W.

5) What is consumer cost to operate one 74&minus;W incandescent bulb for 9 hours per day for 1 year (365 days) if the cost of electricity is $0.119 per kilowatt-hour?


 * -a) $1.976E+01
 * -b) $2.173E+01
 * -c) $2.391E+01
 * -d) $2.630E+01
 * +e) $2.893E+01

6) Three resistors, R1 = 1.82 &Omega;, and R2 = R2 = 4.14 &Omega;, are connected in parallel to a 5.65 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * +a) 1.754E+01 W
 * -b) 1.929E+01 W
 * -c) 2.122E+01 W
 * -d) 2.335E+01 W
 * -e) 2.568E+01 W

7) An ideal 7.9 V voltage source is connected to two resistors in parallel.  One is 2.4$$k\Omega$$, and the other is 5.2 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.68 mA.
 * -b) 0.79 mA.
 * -c) 0.9 mA.
 * +d) 1.04 mA.
 * -e) 1.2 mA.

8) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * -a) 11.67 Joules
 * -b) 2.5 Watts
 * +c) 1.67 Watts
 * -d) None of these are ture.

9) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 466 V.  If the combined external and internal resistance is 123 &Omega and the capacitance is  76 mF, how long will it take for the capacitor's voltage to reach 331.0 V?


 * -a) 9.571E+00 s
 * -b) 1.053E+01 s
 * +c) 1.158E+01 s
 * -d) 1.274E+01 s
 * -e) 1.401E+01 s

10) What is the average current involved when a truck battery sets in motion 728 C of charge in 3.94 s while starting an engine?


 * +a) 1.848E+02 A
 * -b) 2.032E+02 A
 * -c) 2.236E+02 A
 * -d) 2.459E+02 A
 * -e) 2.705E+02 A

Key: E2
1) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * -a) 2.61 x 10-2 W
 * -b) 3.16 x 10-2 W
 * +c) 3.83 x 10-2 W
 * -d) 4.64 x 10-2 W
 * -e) 5.62 x 10-2 W

2) An ideal 3.1 V voltage source is connected to two resistors in parallel.  One is 1.5$$k\Omega$$, and the other is 2.2 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.55 mA.
 * -b) 0.63 mA.
 * -c) 0.73 mA.
 * +d) 0.84 mA.
 * -e) 0.96 mA.

3) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * -a) 11.67 Joules
 * -b) None of these are ture.
 * -c) 2.5 Watts
 * +d) 1.67 Watts

4) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * -a) 7.09 $$\mu$$W.
 * -b) 8.16 $$\mu$$W.
 * +c) 9.38 $$\mu$$W.
 * -d) 10.79 $$\mu$$W.
 * -e) 12.41 $$\mu$$W.

5) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) $$4.5\Omega.$$
 * -b) $$3.5\Omega.$$
 * +c) $$2.5\Omega.$$
 * -d) None of these are true.

6) Three resistors, R1 = 1.41 &Omega;, and R2 = R2 = 3.17 &Omega;, are connected in parallel to a 5.89 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 1.681E+01 W
 * -b) 1.849E+01 W
 * -c) 2.033E+01 W
 * -d) 2.237E+01 W
 * +e) 2.460E+01 W

7) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 351 V.  If the combined external and internal resistance is 148 &Omega and the capacitance is  60 mF, how long will it take for the capacitor's voltage to reach 227.0 V?


 * +a) 9.240E+00 s
 * -b) 1.016E+01 s
 * -c) 1.118E+01 s
 * -d) 1.230E+01 s
 * -e) 1.353E+01 s

8) What is the average current involved when a truck battery sets in motion 760 C of charge in 5.35 s while starting an engine?


 * -a) 1.291E+02 A
 * +b) 1.421E+02 A
 * -c) 1.563E+02 A
 * -d) 1.719E+02 A
 * -e) 1.891E+02 A

9) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 3.82 x 10-4m/s
 * -b) 4.63 x 10-4m/s
 * -c) 5.61 x 10-4m/s
 * -d) 6.8 x 10-4m/s
 * -e) 8.24 x 10-4m/s

10) What is consumer cost to operate one 65&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.134 per kilowatt-hour?


 * -a) $2.866E+01
 * -b) $3.153E+01
 * -c) $3.468E+01
 * +d) $3.815E+01
 * -e) $4.196E+01

Key: F0
1) A DC winch moter draws 12 amps at 129 volts as it lifts a 4.210E+03 N weight at a constant speed of 0.318 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 9.924E-01 &Omega;
 * -b) 1.092E+00 &Omega;
 * -c) 1.201E+00 &Omega;
 * -d) 1.321E+00 &Omega;
 * +e) 1.453E+00 &Omega;

2) A make-believe metal has a density of 1.580E+04 kg/m3 and an atomic mass of 41.5 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * +a) 2.292E+29 e&minus;/m3
 * -b) 2.521E+29 e&minus;/m3
 * -c) 2.773E+29 e&minus;/m3
 * -d) 3.051E+29 e&minus;/m3
 * -e) 3.356E+29 e&minus;/m3

3) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 1.788E+01 W
 * -b) 1.967E+01 W
 * -c) 2.163E+01 W
 * +d) 2.380E+01 W
 * -e) 2.617E+01 W

4) Two sources of emf &epsilon;1=31.0 V, and  &epsilon;2=10.0 V are oriented as shownin the circuit. The resistances are R1=4.22 k&Omega; and  R2=1.37 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.32 mA and I4=1.03 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * +a) 2.290E+00 mA
 * -b) 2.519E+00 mA
 * -c) 2.771E+00 mA
 * -d) 3.048E+00 mA
 * -e) 3.353E+00 mA

5) A 3.1 volt battery moves 52 Coulombs of charge in 1.7 hours. What is the power?


 * -a) 1.79 x 10-2 W
 * -b) 2.17 x 10-2 W
 * +c) 2.63 x 10-2 W
 * -d) 3.19 x 10-2 W
 * -e) 3.87 x 10-2 W

6) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * -a) 2.28 x 103 &Omega;
 * +b) 2.76 x 103 &Omega;
 * -c) 3.34 x 103 &Omega;
 * -d) 4.05 x 103 &Omega;
 * -e) 4.91 x 103 &Omega;

7) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * -a) $$R_{Total} = 3\Omega$$.
 * -b) $$R_{Total} = 0.5454\Omega$$.
 * +c) $$R_{Total} = 6\Omega$$.
 * -d) None of these are true.

8) Three 1 ohm resistors are connected in parallel. What is the total resistance?
 * +a) $$\frac{1}{3}\Omega$$.
 * -b) $$ 3\Omega$$.
 * -c) $$\frac{2}{3}\Omega$$.
 * -d) $$\frac{3}{2}\Omega$$.

9) A battery has an emf of 7.8 volts, and an internal resistance of 351 $$k\Omega$$. It is connected to a 4.2 $$M\Omega$$ resistor.  What power is developed in the 4.2  $$M\Omega$$ resistor?


 * +a) 12.34 $$\mu$$W.
 * -b) 14.19 $$\mu$$W.
 * -c) 16.32 $$\mu$$W.
 * -d) 18.76 $$\mu$$W.
 * -e) 21.58 $$\mu$$W.

10) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * +a) 9.9 ohms.
 * -b) 11.4 ohms.
 * -c) 13.1 ohms.
 * -d) 15.1 ohms.
 * -e) 17.3 ohms.

Key: F1
1) Three 1 ohm resistors are connected in parallel. What is the total resistance?
 * -a) $$\frac{2}{3}\Omega$$.
 * +b) $$\frac{1}{3}\Omega$$.
 * -c) $$\frac{3}{2}\Omega$$.
 * -d) $$ 3\Omega$$.

2) Three resistors, R1 = 0.548 &Omega;, and R2 = R2 = 1.24 &Omega;, are connected in parallel to a 7.16 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 7.029E+01 W
 * -b) 7.731E+01 W
 * -c) 8.505E+01 W
 * +d) 9.355E+01 W
 * -e) 1.029E+02 W

3) Two 6.6 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * -a) 4.4 ohms.
 * -b) 5.1 ohms.
 * -c) 5.8 ohms.
 * +d) 6.7 ohms.
 * -e) 7.7 ohms.

4) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * +a) 7.74 x 102 &Omega;
 * -b) 9.38 x 102 &Omega;
 * -c) 1.14 x 103 &Omega;
 * -d) 1.38 x 103 &Omega;
 * -e) 1.67 x 103 &Omega;

5) Two sources of emf &epsilon;1=24.8 V, and  &epsilon;2=10.3 V are oriented as shownin the circuit. The resistances are R1=2.19 k&Omega; and  R2=1.6 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.49 mA and I4=0.83 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * +a) 1.660E+00 mA
 * -b) 1.826E+00 mA
 * -c) 2.009E+00 mA
 * -d) 2.209E+00 mA
 * -e) 2.430E+00 mA

6) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * -a) 7.09 $$\mu$$W.
 * -b) 8.16 $$\mu$$W.
 * +c) 9.38 $$\mu$$W.
 * -d) 10.79 $$\mu$$W.
 * -e) 12.41 $$\mu$$W.

7) A make-believe metal has a density of 1.480E+04 kg/m3 and an atomic mass of 196.0 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * +a) 4.546E+28 e&minus;/m3
 * -b) 5.000E+28 e&minus;/m3
 * -c) 5.500E+28 e&minus;/m3
 * -d) 6.050E+28 e&minus;/m3
 * -e) 6.655E+28 e&minus;/m3

8) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * -a) $$R_{Total} = 0.5454\Omega$$.
 * -b) None of these are true.
 * -c) $$R_{Total} = 3\Omega$$.
 * +d) $$R_{Total} = 6\Omega$$.

9) A DC winch moter draws 23 amps at 196 volts as it lifts a 4.870E+03 N weight at a constant speed of 0.731 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 1.346E+00 &Omega;
 * -b) 1.481E+00 &Omega;
 * -c) 1.629E+00 &Omega;
 * +d) 1.792E+00 &Omega;
 * -e) 1.971E+00 &Omega;

10) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * -a) 2.61 x 10-2 W
 * -b) 3.16 x 10-2 W
 * +c) 3.83 x 10-2 W
 * -d) 4.64 x 10-2 W
 * -e) 5.62 x 10-2 W

Key: F2
1) Three 1 ohm resistors are connected in parallel. What is the total resistance?
 * -a) $$\frac{3}{2}\Omega$$.
 * +b) $$\frac{1}{3}\Omega$$.
 * -c) $$\frac{2}{3}\Omega$$.
 * -d) $$ 3\Omega$$.

2) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * -a) $$R_{Total} = 0.5454\Omega$$.
 * -b) $$R_{Total} = 3\Omega$$.
 * -c) None of these are true.
 * +d) $$R_{Total} = 6\Omega$$.

3) Three resistors, R1 = 1.39 &Omega;, and R2 = R2 = 3.06 &Omega;, are connected in parallel to a 6.21 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 2.293E+01 W
 * -b) 2.522E+01 W
 * +c) 2.774E+01 W
 * -d) 3.052E+01 W
 * -e) 3.357E+01 W

4) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * +a) 7.74 x 102 &Omega;
 * -b) 9.38 x 102 &Omega;
 * -c) 1.14 x 103 &Omega;
 * -d) 1.38 x 103 &Omega;
 * -e) 1.67 x 103 &Omega;

5) A battery has an emf of 6.7 volts, and an internal resistance of 348 $$k\Omega$$. It is connected to a 3.8 $$M\Omega$$ resistor.  What power is developed in the 3.8  $$M\Omega$$ resistor?


 * +a) 9.91 $$\mu$$W.
 * -b) 11.4 $$\mu$$W.
 * -c) 13.11 $$\mu$$W.
 * -d) 15.08 $$\mu$$W.
 * -e) 17.34 $$\mu$$W.

6) A DC winch moter draws 19 amps at 175 volts as it lifts a 4.230E+03 N weight at a constant speed of 0.483 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * +a) 3.551E+00 &Omega;
 * -b) 3.906E+00 &Omega;
 * -c) 4.297E+00 &Omega;
 * -d) 4.726E+00 &Omega;
 * -e) 5.199E+00 &Omega;

7) Two 7.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.8 ohm resistor.  What is the net resistance?


 * -a) 5.7 ohms.
 * +b) 6.5 ohms.
 * -c) 7.5 ohms.
 * -d) 8.6 ohms.
 * -e) 9.9 ohms.

8) A make-believe metal has a density of 2.670E+03 kg/m3 and an atomic mass of 40.9 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * +a) 3.930E+28 e&minus;/m3
 * -b) 4.323E+28 e&minus;/m3
 * -c) 4.755E+28 e&minus;/m3
 * -d) 5.231E+28 e&minus;/m3
 * -e) 5.754E+28 e&minus;/m3

9) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * +a) 4.43 x 10-2 W
 * -b) 5.37 x 10-2 W
 * -c) 6.51 x 10-2 W
 * -d) 7.88 x 10-2 W
 * -e) 9.55 x 10-2 W

10) Two sources of emf &epsilon;1=36.3 V, and  &epsilon;2=12.9 V are oriented as shownin the circuit. The resistances are R1=4.28 k&Omega; and  R2=1.58 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.16 mA and I4=1.2 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 2.224E+00 mA
 * -b) 2.446E+00 mA
 * -c) 2.691E+00 mA
 * +d) 2.960E+00 mA
 * -e) 3.256E+00 mA

Key: G0
1) Calculate the electric field in a 12-gauge copper wire that is 44 m long and carries a current of 78 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 2.704E-04 V/m
 * -b) 2.974E-04 V/m
 * -c) 3.272E-04 V/m
 * -d) 3.599E-04 V/m
 * +e) 3.959E-04 V/m

2) Imagine a substance could be made into a very hot filament. Suppose the resitance is 4.08 &Omega; at a temperature of 26&deg;C and that the temperature coefficient of expansion is 4.800E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 388 &deg;C?


 * -a) 1.064E+01 &Omega;
 * +b) 1.117E+01 &Omega;
 * -c) 1.173E+01 &Omega;
 * -d) 1.231E+01 &Omega;
 * -e) 1.293E+01 &Omega;

3) In the circuit shown V=15.4 V, R1=2.77 &Omega;, R2=6.07 &Omega;, and R3=14.5 &Omega;. What is the power dissipated by R2?


 * -a) 1.190E+01 W
 * -b) 1.309E+01 W
 * +c) 1.440E+01 W
 * -d) 1.584E+01 W
 * -e) 1.742E+01 W

4) Two sources of emf &epsilon;1=16.8 V, and  &epsilon;2=6.85 V are oriented as shownin the circuit. The resistances are R1=4.43 k&Omega; and  R2=1.24 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.68 mA and I4=0.758 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 3.890E+00 V
 * -b) 4.279E+00 V
 * -c) 4.707E+00 V
 * +d) 5.178E+00 V
 * -e) 5.695E+00 V

5) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * +a) 4.43 x 10-2 W
 * -b) 5.37 x 10-2 W
 * -c) 6.51 x 10-2 W
 * -d) 7.88 x 10-2 W
 * -e) 9.55 x 10-2 W

6) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * -a) 8.42 x 101 volts
 * -b) 1.02 x 102 volts
 * -c) 1.24 x 102 volts
 * -d) 1.5 x 102 volts
 * +e) 1.81 x 102 volts

7) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * +a) $$R_1 = 125V$$ and $$R_2 = 125V$$.
 * -b) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * -c) None of these are true.
 * -d) $$R_1 = 250V$$ and $$R_2 = 0V$$.

8) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * -a) None of these are true.
 * -b) One has full voltage, the other has none.
 * +c) The voltage across both resistors is the same as the source.
 * -d) The voltage across both resistors is half the voltage of the source.

9) A 6.6 ohm resistor is connected in series to a pair of 6.4 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.4 ohms.
 * -b) 7.4 ohms.
 * -c) 8.5 ohms.
 * +d) 9.8 ohms.
 * -e) 11.3 ohms.

10) An ideal 9.2 V voltage source is connected to two resistors in parallel.  One is 1.1$$k\Omega$$, and the other is 2.4 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 2.29 mA.
 * +b) 2.63 mA.
 * -c) 3.02 mA.
 * -d) 3.48 mA.
 * -e) 4 mA.

Key: G1
1) Calculate the electric field in a 12-gauge copper wire that is 26 m long and carries a current of 24 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 9.152E-05 V/m
 * -b) 1.007E-04 V/m
 * -c) 1.107E-04 V/m
 * +d) 1.218E-04 V/m
 * -e) 1.340E-04 V/m

2) A 5.7 ohm resistor is connected in series to a pair of 3.8 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 5 ohms.
 * -b) 5.7 ohms.
 * -c) 6.6 ohms.
 * +d) 7.6 ohms.
 * -e) 8.7 ohms.

3) Imagine a substance could be made into a very hot filament. Suppose the resitance is 4.48 &Omega; at a temperature of 56&deg;C and that the temperature coefficient of expansion is 4.550E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 449 &deg;C?


 * -a) 1.028E+01 &Omega;
 * -b) 1.079E+01 &Omega;
 * -c) 1.133E+01 &Omega;
 * -d) 1.190E+01 &Omega;
 * +e) 1.249E+01 &Omega;

4) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * +a) 4.43 x 10-2 W
 * -b) 5.37 x 10-2 W
 * -c) 6.51 x 10-2 W
 * -d) 7.88 x 10-2 W
 * -e) 9.55 x 10-2 W

5) Two sources of emf &epsilon;1=38.9 V, and  &epsilon;2=14.4 V are oriented as shownin the circuit. The resistances are R1=4.33 k&Omega; and  R2=1.65 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=5.59 mA and I4=1.07 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 9.142E+00 V
 * -b) 1.006E+01 V
 * +c) 1.106E+01 V
 * -d) 1.217E+01 V
 * -e) 1.338E+01 V

6) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * -a) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * +b) $$R_1 = 125V$$ and $$R_2 = 125V$$.
 * -c) $$R_1 = 250V$$ and $$R_2 = 0V$$.
 * -d) None of these are true.

7) An ideal 5.2 V voltage source is connected to two resistors in parallel.  One is 1.2$$k\Omega$$, and the other is 3.6 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.94 mA.
 * +b) 1.08 mA.
 * -c) 1.25 mA.
 * -d) 1.43 mA.
 * -e) 1.65 mA.

8) In the circuit shown V=18.4 V, R1=1.64 &Omega;, R2=6.56 &Omega;, and R3=12.8 &Omega;. What is the power dissipated by R2?


 * -a) 2.470E+01 W
 * +b) 2.717E+01 W
 * -c) 2.989E+01 W
 * -d) 3.288E+01 W
 * -e) 3.617E+01 W

9) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * -a) None of these are true.
 * +b) The voltage across both resistors is the same as the source.
 * -c) The voltage across both resistors is half the voltage of the source.
 * -d) One has full voltage, the other has none.

10) A power supply delivers 138 watts of power to a 206 ohm resistor.  What was the applied voltage?


 * -a) 1.39 x 102 volts
 * +b) 1.69 x 102 volts
 * -c) 2.04 x 102 volts
 * -d) 2.47 x 102 volts
 * -e) 3 x 102 volts

Key: G2
1) A power supply delivers 114 watts of power to a 294 ohm resistor.  What was the applied voltage?


 * -a) 1.25 x 102 volts
 * -b) 1.51 x 102 volts
 * +c) 1.83 x 102 volts
 * -d) 2.22 x 102 volts
 * -e) 2.69 x 102 volts

2) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * -a) 2.61 x 10-2 W
 * -b) 3.16 x 10-2 W
 * +c) 3.83 x 10-2 W
 * -d) 4.64 x 10-2 W
 * -e) 5.62 x 10-2 W

3) Imagine a substance could be made into a very hot filament. Suppose the resitance is 2.61 &Omega; at a temperature of 92&deg;C and that the temperature coefficient of expansion is 4.260E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 422 &deg;C?


 * +a) 6.279E+00 &Omega;
 * -b) 6.593E+00 &Omega;
 * -c) 6.923E+00 &Omega;
 * -d) 7.269E+00 &Omega;
 * -e) 7.632E+00 &Omega;

4) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * -a) $$R_1 = 250V$$ and $$R_2 = 0V$$.
 * -b) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * +c) $$R_1 = 125V$$ and $$R_2 = 125V$$.
 * -d) None of these are true.

5) Calculate the electric field in a 12-gauge copper wire that is 62 m long and carries a current of 52 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 1.983E-04 V/m
 * -b) 2.181E-04 V/m
 * -c) 2.399E-04 V/m
 * +d) 2.639E-04 V/m
 * -e) 2.903E-04 V/m

6) Two sources of emf &epsilon;1=30.6 V, and  &epsilon;2=12.0 V are oriented as shownin the circuit. The resistances are R1=3.46 k&Omega; and  R2=2.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.97 mA and I4=0.643 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 4.986E+00 V
 * -b) 5.484E+00 V
 * -c) 6.033E+00 V
 * -d) 6.636E+00 V
 * +e) 7.299E+00 V

7) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * +a) The voltage across both resistors is the same as the source.
 * -b) None of these are true.
 * -c) One has full voltage, the other has none.
 * -d) The voltage across both resistors is half the voltage of the source.

8) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 8.3 ohms.
 * -b) 9.6 ohms.
 * +c) 11 ohms.
 * -d) 12.7 ohms.
 * -e) 14.5 ohms.

9) An ideal 3.1 V voltage source is connected to two resistors in parallel.  One is 1.5$$k\Omega$$, and the other is 2.2 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.55 mA.
 * -b) 0.63 mA.
 * -c) 0.73 mA.
 * +d) 0.84 mA.
 * -e) 0.96 mA.

10) In the circuit shown V=11.8 V, R1=2.38 &Omega;, R2=5.11 &Omega;, and R3=14.6 &Omega;. What is the power dissipated by R2?


 * -a) 8.489E+00 W
 * -b) 9.338E+00 W
 * +c) 1.027E+01 W
 * -d) 1.130E+01 W
 * -e) 1.243E+01 W

Key: H0
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 5.89 &Omega; at a temperature of 43&deg;C and that the temperature coefficient of expansion is 4.400E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 398 &deg;C?


 * -a) 1.369E+01 &Omega;
 * -b) 1.437E+01 &Omega;
 * +c) 1.509E+01 &Omega;
 * -d) 1.584E+01 &Omega;
 * -e) 1.664E+01 &Omega;

2) What is the average current involved when a truck battery sets in motion 889 C of charge in 3.64 s while starting an engine?


 * +a) 2.442E+02 A
 * -b) 2.687E+02 A
 * -c) 2.955E+02 A
 * -d) 3.251E+02 A
 * -e) 3.576E+02 A

3) Three resistors, R1 = 1.39 &Omega;, and R2 = R2 = 3.06 &Omega;, are connected in parallel to a 6.21 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 2.293E+01 W
 * -b) 2.522E+01 W
 * +c) 2.774E+01 W
 * -d) 3.052E+01 W
 * -e) 3.357E+01 W

4) In the circuit shown V=15.2 V, R1=1.6 &Omega;, R2=7.89 &Omega;, and R3=15.3 &Omega;. What is the power dissipated by R2?


 * +a) 1.713E+01 W
 * -b) 1.885E+01 W
 * -c) 2.073E+01 W
 * -d) 2.280E+01 W
 * -e) 2.508E+01 W

5) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * -a) 7.85 x 10-3 W
 * -b) 9.51 x 10-3 W
 * -c) 1.15 x 10-2 W
 * -d) 1.4 x 10-2 W
 * +e) 1.69 x 10-2 W

6) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * -a) 5.42 x 102 &Omega;
 * -b) 6.57 x 102 &Omega;
 * -c) 7.95 x 102 &Omega;
 * +d) 9.64 x 102 &Omega;
 * -e) 1.17 x 103 &Omega;

7) What is the current through R1, R2, R3, and R4 in the figure shown?
 * -a) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * +b) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * -c) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * -d) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..

8) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * +a) $$\frac{10}{7}\Omega$$.
 * -b) $$\frac{10}{6}\Omega$$.
 * -c) $$\frac{7}{10}\Omega$$.
 * -d) $$\frac{6}{10}\Omega$$.

9) A battery has an emf of 7.8 volts, and an internal resistance of 351 $$k\Omega$$. It is connected to a 4.2 $$M\Omega$$ resistor.  What power is developed in the 4.2  $$M\Omega$$ resistor?


 * +a) 12.34 $$\mu$$W.
 * -b) 14.19 $$\mu$$W.
 * -c) 16.32 $$\mu$$W.
 * -d) 18.76 $$\mu$$W.
 * -e) 21.58 $$\mu$$W.

10) An ideal 5.2 V voltage source is connected to two resistors in parallel.  One is 1.2$$k\Omega$$, and the other is 3.6 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.94 mA.
 * +b) 1.08 mA.
 * -c) 1.25 mA.
 * -d) 1.43 mA.
 * -e) 1.65 mA.

Key: H1
1) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * -a) 2.61 x 10-2 W
 * -b) 3.16 x 10-2 W
 * +c) 3.83 x 10-2 W
 * -d) 4.64 x 10-2 W
 * -e) 5.62 x 10-2 W

2) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * -a) 5.42 x 102 &Omega;
 * -b) 6.57 x 102 &Omega;
 * -c) 7.95 x 102 &Omega;
 * +d) 9.64 x 102 &Omega;
 * -e) 1.17 x 103 &Omega;

3) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 1.788E+01 W
 * -b) 1.967E+01 W
 * -c) 2.163E+01 W
 * +d) 2.380E+01 W
 * -e) 2.617E+01 W

4) In the circuit shown V=17.8 V, R1=2.27 &Omega;, R2=6.79 &Omega;, and R3=15.1 &Omega;. What is the power dissipated by R2?


 * -a) 1.446E+01 W
 * -b) 1.591E+01 W
 * -c) 1.750E+01 W
 * -d) 1.925E+01 W
 * +e) 2.117E+01 W

5) Imagine a substance could be made into a very hot filament. Suppose the resitance is 3.64 &Omega; at a temperature of 82&deg;C and that the temperature coefficient of expansion is 4.530E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 390 &deg;C?


 * -a) 7.532E+00 &Omega;
 * -b) 7.908E+00 &Omega;
 * -c) 8.303E+00 &Omega;
 * +d) 8.719E+00 &Omega;
 * -e) 9.155E+00 &Omega;

6) What is the current through R1, R2, R3, and R4 in the figure shown?
 * +a) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * -b) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * -c) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * -d) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..

7) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{10}{6}\Omega$$.
 * -b) $$\frac{6}{10}\Omega$$.
 * +c) $$\frac{10}{7}\Omega$$.
 * -d) $$\frac{7}{10}\Omega$$.

8) An ideal 9.9 V voltage source is connected to two resistors in parallel.  One is 0.9$$k\Omega$$, and the other is 1.8 $$k\Omega$$.  What is the current through the larger resistor?


 * +a) 3.67 mA.
 * -b) 4.22 mA.
 * -c) 4.85 mA.
 * -d) 5.58 mA.
 * -e) 6.41 mA.

9) What is the average current involved when a truck battery sets in motion 728 C of charge in 3.94 s while starting an engine?


 * +a) 1.848E+02 A
 * -b) 2.032E+02 A
 * -c) 2.236E+02 A
 * -d) 2.459E+02 A
 * -e) 2.705E+02 A

10) A battery has an emf of 7 volts, and an internal resistance of 357 $$k\Omega$$. It is connected to a 2.9 $$M\Omega$$ resistor.  What power is developed in the 2.9  $$M\Omega$$ resistor?


 * +a) 13.4 $$\mu$$W.
 * -b) 15.4 $$\mu$$W.
 * -c) 17.72 $$\mu$$W.
 * -d) 20.37 $$\mu$$W.
 * -e) 23.43 $$\mu$$W.

Key: H2
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 3.58 &Omega; at a temperature of 24&deg;C and that the temperature coefficient of expansion is 5.520E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 349 &deg;C?


 * -a) 9.526E+00 &Omega;
 * +b) 1.000E+01 &Omega;
 * -c) 1.050E+01 &Omega;
 * -d) 1.103E+01 &Omega;
 * -e) 1.158E+01 &Omega;

2) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{10}{6}\Omega$$.
 * +b) $$\frac{10}{7}\Omega$$.
 * -c) $$\frac{7}{10}\Omega$$.
 * -d) $$\frac{6}{10}\Omega$$.

3) Three resistors, R1 = 1.74 &Omega;, and R2 = R2 = 3.92 &Omega;, are connected in parallel to a 8.5 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 2.836E+01 W
 * -b) 3.120E+01 W
 * -c) 3.432E+01 W
 * -d) 3.775E+01 W
 * +e) 4.152E+01 W

4) A battery has an emf of 5.3 volts, and an internal resistance of 428 $$k\Omega$$. It is connected to a 2.3 $$M\Omega$$ resistor.  What power is developed in the 2.3  $$M\Omega$$ resistor?


 * -a) 4.96 $$\mu$$W.
 * -b) 5.71 $$\mu$$W.
 * -c) 6.56 $$\mu$$W.
 * -d) 7.55 $$\mu$$W.
 * +e) 8.68 $$\mu$$W.

5) What is the current through R1, R2, R3, and R4 in the figure shown?
 * +a) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * -b) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * -c) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..
 * -d) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.

6) A 5.8 volt battery moves 95 Coulombs of charge in 0.3 hours. What is the power?


 * -a) 4.21 x 10-1 W
 * +b) 5.1 x 10-1 W
 * -c) 6.18 x 10-1 W
 * -d) 7.49 x 10-1 W
 * -e) 9.07 x 10-1 W

7) What is the average current involved when a truck battery sets in motion 572 C of charge in 3.33 s while starting an engine?


 * -a) 1.173E+02 A
 * -b) 1.291E+02 A
 * -c) 1.420E+02 A
 * -d) 1.562E+02 A
 * +e) 1.718E+02 A

8) In the circuit shown V=17.5 V, R1=2.34 &Omega;, R2=7.1 &Omega;, and R3=15.3 &Omega;. What is the power dissipated by R2?


 * -a) 1.784E+01 W
 * +b) 1.963E+01 W
 * -c) 2.159E+01 W
 * -d) 2.375E+01 W
 * -e) 2.612E+01 W

9) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * +a) 1.47 mA.
 * -b) 1.69 mA.
 * -c) 1.94 mA.
 * -d) 2.23 mA.
 * -e) 2.57 mA.

10) A 130 Watt DC motor draws 0.3 amps of current. What is effective resistance?


 * -a) 8.12 x 102 &Omega;
 * -b) 9.84 x 102 &Omega;
 * -c) 1.19 x 103 &Omega;
 * +d) 1.44 x 103 &Omega;
 * -e) 1.75 x 103 &Omega;

Key: I0
1) What is the average current involved when a truck battery sets in motion 779 C of charge in 3.96 s while starting an engine?


 * -a) 1.626E+02 A
 * -b) 1.788E+02 A
 * +c) 1.967E+02 A
 * -d) 2.164E+02 A
 * -e) 2.380E+02 A

2) A make-believe metal has a density of 1.510E+04 kg/m3 and an atomic mass of 33.6 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * -a) 2.236E+29 e&minus;/m3
 * -b) 2.459E+29 e&minus;/m3
 * +c) 2.705E+29 e&minus;/m3
 * -d) 2.976E+29 e&minus;/m3
 * -e) 3.274E+29 e&minus;/m3

3) Three resistors, R1 = 1.41 &Omega;, and R2 = R2 = 3.17 &Omega;, are connected in parallel to a 5.89 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 1.681E+01 W
 * -b) 1.849E+01 W
 * -c) 2.033E+01 W
 * -d) 2.237E+01 W
 * +e) 2.460E+01 W

4) The resistances in the figure shown are R1= 2.73 &Omega;, R2= 1.4 &Omega;, and R2= 2.35 &Omega;. V1 and V3 are text 0.549 V and 1.27 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.584 V. What is the absolute value of the current through R1?


 * -a) 1.213E-01 A
 * -b) 1.334E-01 A
 * -c) 1.468E-01 A
 * +d) 1.614E-01 A
 * -e) 1.776E-01 A

5) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * -a) 8.42 x 101 volts
 * -b) 1.02 x 102 volts
 * -c) 1.24 x 102 volts
 * -d) 1.5 x 102 volts
 * +e) 1.81 x 102 volts

6) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 3.07 x 10-5m/s
 * -b) 3.72 x 10-5m/s
 * -c) 4.5 x 10-5m/s
 * -d) 5.46 x 10-5m/s
 * +e) 6.61 x 10-5m/s

7) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * -a) 12A
 * +b) 2A
 * -c) 3A
 * -d) 1.5A

8) What is the current through R1 and R2 in the figure shown?
 * -a) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * +b) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * -c) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * -d) $$I_1 = 1A$$ and $$I_2 = 25A$$.

9) An ideal 3.1 V voltage source is connected to two resistors in parallel.  One is 1.5$$k\Omega$$, and the other is 2.2 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.55 mA.
 * -b) 0.63 mA.
 * -c) 0.73 mA.
 * +d) 0.84 mA.
 * -e) 0.96 mA.

10) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 8.3 ohms.
 * -b) 9.6 ohms.
 * +c) 11 ohms.
 * -d) 12.7 ohms.
 * -e) 14.5 ohms.

Key: I1
1) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * -a) 8.42 x 101 volts
 * -b) 1.02 x 102 volts
 * -c) 1.24 x 102 volts
 * -d) 1.5 x 102 volts
 * +e) 1.81 x 102 volts

2) A make-believe metal has a density of 8.060E+03 kg/m3 and an atomic mass of 19.7 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * -a) 1.850E+29 e&minus;/m3
 * -b) 2.036E+29 e&minus;/m3
 * -c) 2.239E+29 e&minus;/m3
 * +d) 2.463E+29 e&minus;/m3
 * -e) 2.709E+29 e&minus;/m3

3) The resistances in the figure shown are R1= 2.73 &Omega;, R2= 1.4 &Omega;, and R2= 2.35 &Omega;. V1 and V3 are text 0.549 V and 1.27 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.584 V. What is the absolute value of the current through R1?


 * -a) 1.213E-01 A
 * -b) 1.334E-01 A
 * -c) 1.468E-01 A
 * +d) 1.614E-01 A
 * -e) 1.776E-01 A

4) What is the current through R1 and R2 in the figure shown?
 * +a) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * -b) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * -c) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * -d) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.

5) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 2.77 x 10-5m/s
 * -b) 3.36 x 10-5m/s
 * -c) 4.06 x 10-5m/s
 * -d) 4.92 x 10-5m/s
 * -e) 5.97 x 10-5m/s

6) Three resistors, R1 = 0.87 &Omega;, and R2 = R2 = 2.0 &Omega;, are connected in parallel to a 8.57 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 6.977E+01 W
 * -b) 7.674E+01 W
 * +c) 8.442E+01 W
 * -d) 9.286E+01 W
 * -e) 1.021E+02 W

7) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * +a) 1.47 mA.
 * -b) 1.69 mA.
 * -c) 1.94 mA.
 * -d) 2.23 mA.
 * -e) 2.57 mA.

8) A 6.3 ohm resistor is connected in series to a pair of 3.4 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 5.3 ohms.
 * -b) 6 ohms.
 * -c) 7 ohms.
 * +d) 8 ohms.
 * -e) 9.2 ohms.

9) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * +a) 2A
 * -b) 1.5A
 * -c) 12A
 * -d) 3A

10) What is the average current involved when a truck battery sets in motion 659 C of charge in 5.48 s while starting an engine?


 * -a) 8.214E+01 A
 * -b) 9.035E+01 A
 * -c) 9.938E+01 A
 * -d) 1.093E+02 A
 * +e) 1.203E+02 A

Key: I2
1) What is the average current involved when a truck battery sets in motion 631 C of charge in 3.8 s while starting an engine?


 * +a) 1.661E+02 A
 * -b) 1.827E+02 A
 * -c) 2.009E+02 A
 * -d) 2.210E+02 A
 * -e) 2.431E+02 A

2) A 5.6 ohm resistor is connected in series to a pair of 7.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 7 ohms.
 * -b) 8 ohms.
 * +c) 9.2 ohms.
 * -d) 10.6 ohms.
 * -e) 12.2 ohms.

3) An ideal 4.2 V voltage source is connected to two resistors in parallel.  One is 1.6$$k\Omega$$, and the other is 2.1 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.75 mA.
 * -b) 0.86 mA.
 * -c) 0.99 mA.
 * +d) 1.14 mA.
 * -e) 1.31 mA.

4) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 1.788E+01 W
 * -b) 1.967E+01 W
 * -c) 2.163E+01 W
 * +d) 2.380E+01 W
 * -e) 2.617E+01 W

5) What is the current through R1 and R2 in the figure shown?
 * -a) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * -b) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * +c) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * -d) $$I_1 = 1A$$ and $$I_2 = 25A$$.

6) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * -a) 3A
 * +b) 2A
 * -c) 12A
 * -d) 1.5A

7) The resistances in the figure shown are R1= 2.24 &Omega;, R2= 1.03 &Omega;, and R2= 2.39 &Omega;. V1 and V3 are text 0.595 V and 2.58 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.707 V. What is the absolute value of the current through R1?


 * -a) 1.834E-01 A
 * +b) 2.018E-01 A
 * -c) 2.220E-01 A
 * -d) 2.441E-01 A
 * -e) 2.686E-01 A

8) A make-believe metal has a density of 1.480E+04 kg/m3 and an atomic mass of 196.0 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * +a) 4.546E+28 e&minus;/m3
 * -b) 5.000E+28 e&minus;/m3
 * -c) 5.500E+28 e&minus;/m3
 * -d) 6.050E+28 e&minus;/m3
 * -e) 6.655E+28 e&minus;/m3

9) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.7 x 10-4m/s
 * -b) 3.27 x 10-4m/s
 * -c) 3.96 x 10-4m/s
 * -d) 4.79 x 10-4m/s
 * +e) 5.81 x 10-4m/s

10) A power supply delivers 145 watts of power to a 244 ohm resistor.  What was the applied voltage?


 * +a) 1.88 x 102 volts
 * -b) 2.28 x 102 volts
 * -c) 2.76 x 102 volts
 * -d) 3.34 x 102 volts
 * -e) 4.05 x 102 volts

Key: J0
1) Calculate the electric field in a 12-gauge copper wire that is 16 m long and carries a current of 58 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 2.212E-04 V/m
 * -b) 2.433E-04 V/m
 * -c) 2.676E-04 V/m
 * +d) 2.944E-04 V/m
 * -e) 3.238E-04 V/m

2) A make-believe metal has a density of 8.690E+03 kg/m3 and an atomic mass of 48.4 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * +a) 1.081E+29 e&minus;/m3
 * -b) 1.189E+29 e&minus;/m3
 * -c) 1.308E+29 e&minus;/m3
 * -d) 1.439E+29 e&minus;/m3
 * -e) 1.582E+29 e&minus;/m3

3) In the circuit shown V=15.4 V, R1=2.77 &Omega;, R2=6.07 &Omega;, and R3=14.5 &Omega;. What is the power dissipated by R2?


 * -a) 1.190E+01 W
 * -b) 1.309E+01 W
 * +c) 1.440E+01 W
 * -d) 1.584E+01 W
 * -e) 1.742E+01 W

4) A battery with a terminal voltage of 13.2 V is connected to a circuit consisting of 3 15.7 &Omega; resistors and one 10.3 &Omega; resistor. What is the voltage drop across the 10.3 &Omega; resistor?


 * -a) 1.958E+00 V
 * -b) 2.153E+00 V
 * +c) 2.369E+00 V
 * -d) 2.606E+00 V
 * -e) 2.866E+00 V

5) A 3.1 volt battery moves 52 Coulombs of charge in 1.7 hours. What is the power?


 * -a) 1.79 x 10-2 W
 * -b) 2.17 x 10-2 W
 * +c) 2.63 x 10-2 W
 * -d) 3.19 x 10-2 W
 * -e) 3.87 x 10-2 W

6) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * -a) 2.28 x 103 &Omega;
 * +b) 2.76 x 103 &Omega;
 * -c) 3.34 x 103 &Omega;
 * -d) 4.05 x 103 &Omega;
 * -e) 4.91 x 103 &Omega;

7) What is the current through R1, R2, R3, and R4 in the figure shown?
 * +a) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * -b) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * -c) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * -d) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..

8) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * -a) It's an Electrical Cliche.
 * -b) None these are correct
 * -c) The other point could be Negative or positive.
 * +d) Voltage is a measure of Electric Potential difference between two electrical points.

9) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * -a) 3.1 ohms.
 * -b) 3.6 ohms.
 * -c) 4.2 ohms.
 * -d) 4.8 ohms.
 * +e) 5.5 ohms.

10) An ideal 7.5 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 19$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 54.3 A.
 * -b) 62.4 A.
 * -c) 71.8 A.
 * -d) 82.6 A.
 * +e) 94.9 A.

Key: J1
1) In the circuit shown V=15.4 V, R1=2.55 &Omega;, R2=5.12 &Omega;, and R3=12.7 &Omega;. What is the power dissipated by R2?


 * -a) 1.096E+01 W
 * -b) 1.206E+01 W
 * -c) 1.326E+01 W
 * -d) 1.459E+01 W
 * +e) 1.605E+01 W

2) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * +a) 6.5 ohms.
 * -b) 7.5 ohms.
 * -c) 8.6 ohms.
 * -d) 9.9 ohms.
 * -e) 11.4 ohms.

3) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * +a) 4.43 x 10-2 W
 * -b) 5.37 x 10-2 W
 * -c) 6.51 x 10-2 W
 * -d) 7.88 x 10-2 W
 * -e) 9.55 x 10-2 W

4) A battery with a terminal voltage of 9.88 V is connected to a circuit consisting of 3 15.9 &Omega; resistors and one 10.8 &Omega; resistor. What is the voltage drop across the 10.8 &Omega; resistor?


 * -a) 1.370E+00 V
 * -b) 1.507E+00 V
 * -c) 1.658E+00 V
 * +d) 1.824E+00 V
 * -e) 2.006E+00 V

5) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * +a) Voltage is a measure of Electric Potential difference between two electrical points.
 * -b) The other point could be Negative or positive.
 * -c) It's an Electrical Cliche.
 * -d) None these are correct

6) A make-believe metal has a density of 7.000E+03 kg/m3 and an atomic mass of 89.4 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * -a) 3.219E+28 e&minus;/m3
 * -b) 3.541E+28 e&minus;/m3
 * -c) 3.896E+28 e&minus;/m3
 * -d) 4.285E+28 e&minus;/m3
 * +e) 4.714E+28 e&minus;/m3

7) Calculate the electric field in a 12-gauge copper wire that is 78 m long and carries a current of 24 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 1.218E-04 V/m
 * -b) 1.340E-04 V/m
 * -c) 1.474E-04 V/m
 * -d) 1.621E-04 V/m
 * -e) 1.783E-04 V/m

8) What is the current through R1, R2, R3, and R4 in the figure shown?
 * +a) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.
 * -b) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * -c) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..
 * -d) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.

9) An ideal 6.4 volt battery is connected to a 0.071 ohm resistor.  To measure the current an ammeter with a resistance of 21$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 60.5 A.
 * +b) 69.6 A.
 * -c) 80 A.
 * -d) 92 A.
 * -e) 105.8 A.

10) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * -a) 2.2 x 103 &Omega;
 * +b) 2.67 x 103 &Omega;
 * -c) 3.23 x 103 &Omega;
 * -d) 3.91 x 103 &Omega;
 * -e) 4.74 x 103 &Omega;

Key: J2
1) Calculate the electric field in a 12-gauge copper wire that is 99 m long and carries a current of 71 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 3.604E-04 V/m
 * -b) 3.964E-04 V/m
 * -c) 4.360E-04 V/m
 * -d) 4.796E-04 V/m
 * -e) 5.276E-04 V/m

2) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * -a) None these are correct
 * -b) It's an Electrical Cliche.
 * +c) Voltage is a measure of Electric Potential difference between two electrical points.
 * -d) The other point could be Negative or positive.

3) What is the current through R1, R2, R3, and R4 in the figure shown?
 * -a) $$I_1 = 1A$$; $$I_2 = 5A$$; $$I_3 = 3.3A$$; $$I_4 = 2.5A$$.
 * -b) $$I_1 = 10A$$; $$I_2 = 50A$$; $$I_3 = 33A$$; $$I_4 = 25A$$..
 * -c) $$I_1 = 0.25A$$; $$I_2 = 0.33A$$; $$I_3 = 0.5A$$; $$I_4 = 0.1A$$.
 * +d) $$I_1 = 1A$$; $$I_2 = 0.5A$$; $$I_3 = 0.33A$$; $$I_4 = 0.25A$$.

4) A battery with a terminal voltage of 14.1 V is connected to a circuit consisting of 2 20.3 &Omega; resistors and one 13.1 &Omega; resistor. What is the voltage drop across the 13.1 &Omega; resistor?


 * -a) 2.843E+00 V
 * -b) 3.127E+00 V
 * +c) 3.440E+00 V
 * -d) 3.784E+00 V
 * -e) 4.162E+00 V

5) A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?


 * +a) 4.06 x 10-2 W
 * -b) 4.92 x 10-2 W
 * -c) 5.96 x 10-2 W
 * -d) 7.22 x 10-2 W
 * -e) 8.75 x 10-2 W

6) In the circuit shown V=18.8 V, R1=2.59 &Omega;, R2=5.47 &Omega;, and R3=15.8 &Omega;. What is the power dissipated by R2?


 * -a) 2.191E+01 W
 * +b) 2.410E+01 W
 * -c) 2.651E+01 W
 * -d) 2.916E+01 W
 * -e) 3.208E+01 W

7) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * +a) 9.9 ohms.
 * -b) 11.4 ohms.
 * -c) 13.1 ohms.
 * -d) 15.1 ohms.
 * -e) 17.3 ohms.

8) A make-believe metal has a density of 2.670E+03 kg/m3 and an atomic mass of 40.9 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * +a) 3.930E+28 e&minus;/m3
 * -b) 4.323E+28 e&minus;/m3
 * -c) 4.755E+28 e&minus;/m3
 * -d) 5.231E+28 e&minus;/m3
 * -e) 5.754E+28 e&minus;/m3

9) An ideal 6.4 volt battery is connected to a 0.071 ohm resistor.  To measure the current an ammeter with a resistance of 21$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 60.5 A.
 * +b) 69.6 A.
 * -c) 80 A.
 * -d) 92 A.
 * -e) 105.8 A.

10) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * +a) 7.74 x 102 &Omega;
 * -b) 9.38 x 102 &Omega;
 * -c) 1.14 x 103 &Omega;
 * -d) 1.38 x 103 &Omega;
 * -e) 1.67 x 103 &Omega;

Key: K0
1) What is the average current involved when a truck battery sets in motion 546 C of charge in 3.7 s while starting an engine?


 * -a) 1.220E+02 A
 * -b) 1.342E+02 A
 * +c) 1.476E+02 A
 * -d) 1.623E+02 A
 * -e) 1.786E+02 A

2) Calculate the electric field in a 12-gauge copper wire that is 17 m long and carries a current of 56 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 1.941E-04 V/m
 * -b) 2.135E-04 V/m
 * -c) 2.349E-04 V/m
 * -d) 2.584E-04 V/m
 * +e) 2.842E-04 V/m

3) In the circuit shown V=18.8 V, R1=2.59 &Omega;, R2=5.47 &Omega;, and R3=15.8 &Omega;. What is the power dissipated by R2?


 * -a) 2.191E+01 W
 * +b) 2.410E+01 W
 * -c) 2.651E+01 W
 * -d) 2.916E+01 W
 * -e) 3.208E+01 W

4) The resistances in the figure shown are R1= 2.54 &Omega;, R2= 1.15 &Omega;, and R2= 2.9 &Omega;. V1 and V3 are text 0.446 V and 3.39 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.744 V. What is the absolute value of the current through R1?


 * +a) 1.285E-01 A
 * -b) 1.414E-01 A
 * -c) 1.555E-01 A
 * -d) 1.711E-01 A
 * -e) 1.882E-01 A

5) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.24 x 10-5m/s
 * -b) 2.72 x 10-5m/s
 * -c) 3.29 x 10-5m/s
 * +d) 3.99 x 10-5m/s
 * -e) 4.83 x 10-5m/s

6) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * -a) 7.85 x 10-3 W
 * -b) 9.51 x 10-3 W
 * -c) 1.15 x 10-2 W
 * -d) 1.4 x 10-2 W
 * +e) 1.69 x 10-2 W

7) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * +a) $$\frac{10}{7}\Omega$$.
 * -b) $$\frac{7}{10}\Omega$$.
 * -c) $$\frac{10}{6}\Omega$$.
 * -d) $$\frac{6}{10}\Omega$$.

8) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * +a) 0.5V.
 * -b) 10V.
 * -c) 15V.
 * -d) 2V.

9) A battery has an emf of 6.7 volts, and an internal resistance of 348 $$k\Omega$$. It is connected to a 3.8 $$M\Omega$$ resistor.  What power is developed in the 3.8  $$M\Omega$$ resistor?


 * +a) 9.91 $$\mu$$W.
 * -b) 11.4 $$\mu$$W.
 * -c) 13.11 $$\mu$$W.
 * -d) 15.08 $$\mu$$W.
 * -e) 17.34 $$\mu$$W.

10) Two 7 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.8 ohm resistor.  What is the net resistance?


 * -a) 5.5 ohms.
 * +b) 6.3 ohms.
 * -c) 7.2 ohms.
 * -d) 8.3 ohms.
 * -e) 9.6 ohms.

Key: K1
1) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 3.07 x 10-5m/s
 * -b) 3.72 x 10-5m/s
 * -c) 4.5 x 10-5m/s
 * -d) 5.46 x 10-5m/s
 * +e) 6.61 x 10-5m/s

2) Calculate the electric field in a 12-gauge copper wire that is 41 m long and carries a current of 71 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 3.604E-04 V/m
 * -b) 3.964E-04 V/m
 * -c) 4.360E-04 V/m
 * -d) 4.796E-04 V/m
 * -e) 5.276E-04 V/m

3) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * -a) 10V.
 * -b) 2V.
 * -c) 15V.
 * +d) 0.5V.

4) In the circuit shown V=18.8 V, R1=2.59 &Omega;, R2=5.47 &Omega;, and R3=15.8 &Omega;. What is the power dissipated by R2?


 * -a) 2.191E+01 W
 * +b) 2.410E+01 W
 * -c) 2.651E+01 W
 * -d) 2.916E+01 W
 * -e) 3.208E+01 W

5) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * +a) 6.5 ohms.
 * -b) 7.5 ohms.
 * -c) 8.6 ohms.
 * -d) 9.9 ohms.
 * -e) 11.4 ohms.

6) A battery has an emf of 5.6 volts, and an internal resistance of 295 $$k\Omega$$. It is connected to a 4.1 $$M\Omega$$ resistor.  What power is developed in the 4.1  $$M\Omega$$ resistor?


 * -a) 3.81 $$\mu$$W.
 * -b) 4.38 $$\mu$$W.
 * -c) 5.03 $$\mu$$W.
 * -d) 5.79 $$\mu$$W.
 * +e) 6.66 $$\mu$$W.

7) A 5.8 volt battery moves 95 Coulombs of charge in 0.3 hours. What is the power?


 * -a) 4.21 x 10-1 W
 * +b) 5.1 x 10-1 W
 * -c) 6.18 x 10-1 W
 * -d) 7.49 x 10-1 W
 * -e) 9.07 x 10-1 W

8) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{6}{10}\Omega$$.
 * -b) $$\frac{7}{10}\Omega$$.
 * +c) $$\frac{10}{7}\Omega$$.
 * -d) $$\frac{10}{6}\Omega$$.

9) What is the average current involved when a truck battery sets in motion 775 C of charge in 2.9 s while starting an engine?


 * -a) 2.209E+02 A
 * -b) 2.429E+02 A
 * +c) 2.672E+02 A
 * -d) 2.940E+02 A
 * -e) 3.234E+02 A

10) The resistances in the figure shown are R1= 2.49 &Omega;, R2= 1.72 &Omega;, and R2= 3.58 &Omega;. V1 and V3 are text 0.417 V and 1.83 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.53 V. What is the absolute value of the current through R1?


 * -a) 8.220E-02 A
 * -b) 9.042E-02 A
 * -c) 9.946E-02 A
 * +d) 1.094E-01 A
 * -e) 1.203E-01 A

Key: K2
1) Calculate the electric field in a 12-gauge copper wire that is 41 m long and carries a current of 71 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 3.604E-04 V/m
 * -b) 3.964E-04 V/m
 * -c) 4.360E-04 V/m
 * -d) 4.796E-04 V/m
 * -e) 5.276E-04 V/m

2) In the circuit shown V=15.4 V, R1=2.77 &Omega;, R2=6.07 &Omega;, and R3=14.5 &Omega;. What is the power dissipated by R2?


 * -a) 1.190E+01 W
 * -b) 1.309E+01 W
 * +c) 1.440E+01 W
 * -d) 1.584E+01 W
 * -e) 1.742E+01 W

3) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{10}{6}\Omega$$.
 * -b) $$\frac{7}{10}\Omega$$.
 * -c) $$\frac{6}{10}\Omega$$.
 * +d) $$\frac{10}{7}\Omega$$.

4) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * -a) 10V.
 * -b) 15V.
 * -c) 2V.
 * +d) 0.5V.

5) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * -a) 2.61 x 10-2 W
 * -b) 3.16 x 10-2 W
 * +c) 3.83 x 10-2 W
 * -d) 4.64 x 10-2 W
 * -e) 5.62 x 10-2 W

6) What is the average current involved when a truck battery sets in motion 889 C of charge in 3.64 s while starting an engine?


 * +a) 2.442E+02 A
 * -b) 2.687E+02 A
 * -c) 2.955E+02 A
 * -d) 3.251E+02 A
 * -e) 3.576E+02 A

7) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.24 x 10-5m/s
 * -b) 2.72 x 10-5m/s
 * -c) 3.29 x 10-5m/s
 * +d) 3.99 x 10-5m/s
 * -e) 4.83 x 10-5m/s

8) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * -a) 3.1 ohms.
 * -b) 3.6 ohms.
 * -c) 4.2 ohms.
 * -d) 4.8 ohms.
 * +e) 5.5 ohms.

9) A battery has an emf of 6.5 volts, and an internal resistance of 446 $$k\Omega$$. It is connected to a 3.5 $$M\Omega$$ resistor.  What power is developed in the 3.5  $$M\Omega$$ resistor?


 * -a) 8.26 $$\mu$$W.
 * +b) 9.5 $$\mu$$W.
 * -c) 10.92 $$\mu$$W.
 * -d) 12.56 $$\mu$$W.
 * -e) 14.44 $$\mu$$W.

10) The resistances in the figure shown are R1= 1.54 &Omega;, R2= 0.927 &Omega;, and R2= 2.46 &Omega;. V1 and V3 are text 0.632 V and 2.12 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.586 V. What is the absolute value of the current through R1?


 * -a) 1.770E-01 A
 * -b) 1.947E-01 A
 * +c) 2.141E-01 A
 * -d) 2.355E-01 A
 * -e) 2.591E-01 A

Key: L0
1) What is the average current involved when a truck battery sets in motion 701 C of charge in 4.98 s while starting an engine?


 * -a) 1.280E+02 A
 * +b) 1.408E+02 A
 * -c) 1.548E+02 A
 * -d) 1.703E+02 A
 * -e) 1.874E+02 A

2) Calculate the drift speed of electrons in a copper wire with a diameter of 3.33 mm carrying a 13.8 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * -a) 8.910E-05 m/s
 * -b) 9.801E-05 m/s
 * -c) 1.078E-04 m/s
 * +d) 1.186E-04 m/s
 * -e) 1.305E-04 m/s

3) Two sources of emf &epsilon;1=43.7 V, and  &epsilon;2=13.1 V are oriented as shownin the circuit. The resistances are R1=5.21 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.86 mA and I4=0.9 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 2.691E+00 mA
 * +b) 2.960E+00 mA
 * -c) 3.256E+00 mA
 * -d) 3.582E+00 mA
 * -e) 3.940E+00 mA

4) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 1.788E+01 W
 * -b) 1.967E+01 W
 * -c) 2.163E+01 W
 * +d) 2.380E+01 W
 * -e) 2.617E+01 W

5) The diameter of a copper wire is 1.9 mm, and it carries a current of 33 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 5.93 x 10-4m/s
 * -b) 7.19 x 10-4m/s
 * +c) 8.71 x 10-4m/s
 * -d) 1.06 x 10-3m/s
 * -e) 1.28 x 10-3m/s

6) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * +a) 7.74 x 102 &Omega;
 * -b) 9.38 x 102 &Omega;
 * -c) 1.14 x 103 &Omega;
 * -d) 1.38 x 103 &Omega;
 * -e) 1.67 x 103 &Omega;

7) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * -a) 15V.
 * -b) 10V.
 * -c) 2V.
 * +d) 0.5V.

8) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * +a) Voltage is a measure of Electric Potential difference between two electrical points.
 * -b) None these are correct
 * -c) The other point could be Negative or positive.
 * -d) It's an Electrical Cliche.

9) An ideal 6.8 volt battery is connected to a 0.096 ohm resistor.  To measure the current an ammeter with a resistance of 29$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 35.8 A.
 * -b) 41.1 A.
 * -c) 47.3 A.
 * +d) 54.4 A.
 * -e) 62.6 A.

10) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * +a) 9.9 ohms.
 * -b) 11.4 ohms.
 * -c) 13.1 ohms.
 * -d) 15.1 ohms.
 * -e) 17.3 ohms.

Key: L1
1) An ideal 5.7 volt battery is connected to a 0.091 ohm resistor.  To measure the current an ammeter with a resistance of 23$$m\Omega$$ is used.  What current does the ammeter actually read?


 * +a) 50 A.
 * -b) 57.5 A.
 * -c) 66.1 A.
 * -d) 76 A.
 * -e) 87.5 A.

2) The diameter of a copper wire is 1.9 mm, and it carries a current of 33 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 5.93 x 10-4m/s
 * -b) 7.19 x 10-4m/s
 * +c) 8.71 x 10-4m/s
 * -d) 1.06 x 10-3m/s
 * -e) 1.28 x 10-3m/s

3) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * -a) 3.1 ohms.
 * -b) 3.6 ohms.
 * -c) 4.2 ohms.
 * -d) 4.8 ohms.
 * +e) 5.5 ohms.

4) What is the average current involved when a truck battery sets in motion 537 C of charge in 5.08 s while starting an engine?


 * -a) 8.736E+01 A
 * -b) 9.610E+01 A
 * +c) 1.057E+02 A
 * -d) 1.163E+02 A
 * -e) 1.279E+02 A

5) Three resistors, R1 = 0.686 &Omega;, and R2 = R2 = 1.58 &Omega;, are connected in parallel to a 8.97 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * +a) 1.173E+02 W
 * -b) 1.290E+02 W
 * -c) 1.419E+02 W
 * -d) 1.561E+02 W
 * -e) 1.717E+02 W

6) Two sources of emf &epsilon;1=38.9 V, and  &epsilon;2=15.7 V are oriented as shownin the circuit. The resistances are R1=2.24 k&Omega; and  R2=2.23 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.01 mA and I4=0.86 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 1.955E+00 mA
 * +b) 2.150E+00 mA
 * -c) 2.365E+00 mA
 * -d) 2.601E+00 mA
 * -e) 2.862E+00 mA

7) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * -a) 2V.
 * -b) 15V.
 * -c) 10V.
 * +d) 0.5V.

8) A 196 Watt DC motor draws 0.35 amps of current. What is effective resistance?


 * +a) 1.6 x 103 &Omega;
 * -b) 1.94 x 103 &Omega;
 * -c) 2.35 x 103 &Omega;
 * -d) 2.85 x 103 &Omega;
 * -e) 3.45 x 103 &Omega;

9) Calculate the drift speed of electrons in a copper wire with a diameter of 5.33 mm carrying a 5.1 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * +a) 1.711E-05 m/s
 * -b) 1.882E-05 m/s
 * -c) 2.070E-05 m/s
 * -d) 2.277E-05 m/s
 * -e) 2.505E-05 m/s

10) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * -a) None these are correct
 * -b) The other point could be Negative or positive.
 * -c) It's an Electrical Cliche.
 * +d) Voltage is a measure of Electric Potential difference between two electrical points.

Key: L2
1) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 1.788E+01 W
 * -b) 1.967E+01 W
 * -c) 2.163E+01 W
 * +d) 2.380E+01 W
 * -e) 2.617E+01 W

2) Two sources of emf &epsilon;1=24.9 V, and  &epsilon;2=10.1 V are oriented as shownin the circuit. The resistances are R1=2.32 k&Omega; and  R2=2.31 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.74 mA and I4=0.444 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 1.725E+00 mA
 * -b) 1.898E+00 mA
 * -c) 2.087E+00 mA
 * +d) 2.296E+00 mA
 * -e) 2.526E+00 mA

3) The diameter of a copper wire is 9.2 mm, and it carries a current of 64 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 4.91 x 10-5m/s
 * -b) 5.95 x 10-5m/s
 * +c) 7.2 x 10-5m/s
 * -d) 8.73 x 10-5m/s
 * -e) 1.06 x 10-4m/s

4) An ideal 7.8 volt battery is connected to a 0.064 ohm resistor.  To measure the current an ammeter with a resistance of 17$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 63.3 A.
 * -b) 72.8 A.
 * -c) 83.7 A.
 * +d) 96.3 A.
 * -e) 110.7 A.

5) What is the average current involved when a truck battery sets in motion 618 C of charge in 2.28 s while starting an engine?


 * -a) 2.240E+02 A
 * -b) 2.464E+02 A
 * +c) 2.711E+02 A
 * -d) 2.982E+02 A
 * -e) 3.280E+02 A

6) Two 6.6 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * -a) 4.4 ohms.
 * -b) 5.1 ohms.
 * -c) 5.8 ohms.
 * +d) 6.7 ohms.
 * -e) 7.7 ohms.

7) A 104 Watt DC motor draws 0.13 amps of current. What is effective resistance?


 * -a) 3.46 x 103 &Omega;
 * -b) 4.19 x 103 &Omega;
 * -c) 5.08 x 103 &Omega;
 * +d) 6.15 x 103 &Omega;
 * -e) 7.46 x 103 &Omega;

8) Calculate the drift speed of electrons in a copper wire with a diameter of 3.33 mm carrying a 13.8 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * -a) 8.910E-05 m/s
 * -b) 9.801E-05 m/s
 * -c) 1.078E-04 m/s
 * +d) 1.186E-04 m/s
 * -e) 1.305E-04 m/s

9) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
 * +a) 0.5V.
 * -b) 10V.
 * -c) 15V.
 * -d) 2V.

10) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * -a) None these are correct
 * -b) It's an Electrical Cliche.
 * -c) The other point could be Negative or positive.
 * +d) Voltage is a measure of Electric Potential difference between two electrical points.

Key: M0
1) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=52 C  and $$\tau=$$0.018 s. What is the current at $$t=$$0.0207 s?


 * -a) 6.872E+02 A
 * -b) 7.560E+02 A
 * -c) 8.316E+02 A
 * +d) 9.147E+02 A
 * -e) 1.006E+03 A

2) What is consumer cost to operate one 77&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.124 per kilowatt-hour?


 * -a) $3.142E+01
 * -b) $3.456E+01
 * -c) $3.802E+01
 * +d) $4.182E+01
 * -e) $4.600E+01

3) In the circuit shown V=15.2 V, R1=1.6 &Omega;, R2=7.89 &Omega;, and R3=15.3 &Omega;. What is the power dissipated by R2?


 * +a) 1.713E+01 W
 * -b) 1.885E+01 W
 * -c) 2.073E+01 W
 * -d) 2.280E+01 W
 * -e) 2.508E+01 W

4) Three resistors, R1 = 1.52 &Omega;, and R2 = R2 = 3.38 &Omega;, are connected in parallel to a 5.82 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 1.842E+01 W
 * -b) 2.026E+01 W
 * +c) 2.228E+01 W
 * -d) 2.451E+01 W
 * -e) 2.696E+01 W

5) A power supply delivers 169 watts of power to a 219 ohm resistor.  What was the applied voltage?


 * -a) 8.93 x 101 volts
 * -b) 1.08 x 102 volts
 * -c) 1.31 x 102 volts
 * -d) 1.59 x 102 volts
 * +e) 1.92 x 102 volts

6) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.24 x 10-5m/s
 * -b) 2.72 x 10-5m/s
 * -c) 3.29 x 10-5m/s
 * +d) 3.99 x 10-5m/s
 * -e) 4.83 x 10-5m/s

7) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) None of these are true.
 * -b) $$3.5\Omega.$$
 * +c) $$2.5\Omega.$$
 * -d) $$4.5\Omega.$$

8) What is the current through R1 and R2 in the figure shown?
 * -a) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * -b) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * -c) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * +d) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.

9) An ideal 5.9 volt battery is connected to a 0.059 ohm resistor.  To measure the current an ammeter with a resistance of 24$$m\Omega$$ is used.  What current does the ammeter actually read?


 * +a) 71.1 A.
 * -b) 81.7 A.
 * -c) 94 A.
 * -d) 108.1 A.
 * -e) 124.3 A.

10) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.1 ohms.
 * -b) 7 ohms.
 * -c) 8.1 ohms.
 * -d) 9.3 ohms.
 * +e) 10.7 ohms.

Key: M1
1) In the circuit shown V=15.2 V, R1=1.6 &Omega;, R2=7.89 &Omega;, and R3=15.3 &Omega;. What is the power dissipated by R2?


 * +a) 1.713E+01 W
 * -b) 1.885E+01 W
 * -c) 2.073E+01 W
 * -d) 2.280E+01 W
 * -e) 2.508E+01 W

2) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=78 C  and $$\tau=$$0.0244 s. What is the current at $$t=$$0.0225 s?


 * +a) 1.271E+03 A
 * -b) 1.398E+03 A
 * -c) 1.538E+03 A
 * -d) 1.692E+03 A
 * -e) 1.861E+03 A

3) An ideal 7.5 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 19$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 54.3 A.
 * -b) 62.4 A.
 * -c) 71.8 A.
 * -d) 82.6 A.
 * +e) 94.9 A.

4) Three resistors, R1 = 1.31 &Omega;, and R2 = R2 = 2.91 &Omega;, are connected in parallel to a 6.03 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 2.294E+01 W
 * -b) 2.523E+01 W
 * +c) 2.776E+01 W
 * -d) 3.053E+01 W
 * -e) 3.359E+01 W

5) What is consumer cost to operate one 89&minus;W incandescent bulb for 10 hours per day for 1 year (365 days) if the cost of electricity is $0.141 per kilowatt-hour?


 * -a) $3.785E+01
 * -b) $4.164E+01
 * +c) $4.580E+01
 * -d) $5.038E+01
 * -e) $5.542E+01

6) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) $$3.5\Omega.$$
 * +b) $$2.5\Omega.$$
 * -c) None of these are true.
 * -d) $$4.5\Omega.$$

7) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * -a) 8.42 x 101 volts
 * -b) 1.02 x 102 volts
 * -c) 1.24 x 102 volts
 * -d) 1.5 x 102 volts
 * +e) 1.81 x 102 volts

8) What is the current through R1 and R2 in the figure shown?
 * -a) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * +b) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * -c) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * -d) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.

9) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 6.77 x 10-5m/s
 * -b) 8.2 x 10-5m/s
 * -c) 9.93 x 10-5m/s
 * +d) 1.2 x 10-4m/s
 * -e) 1.46 x 10-4m/s

10) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.1 ohms.
 * -b) 7 ohms.
 * -c) 8.1 ohms.
 * -d) 9.3 ohms.
 * +e) 10.7 ohms.

Key: M2
1) What is the current through R1 and R2 in the figure shown?
 * +a) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * -b) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * -c) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * -d) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.

2) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=30 C  and $$\tau=$$0.0178 s. What is the current at $$t=$$0.0161 s?


 * -a) 5.125E+02 A
 * -b) 5.638E+02 A
 * -c) 6.201E+02 A
 * +d) 6.822E+02 A
 * -e) 7.504E+02 A

3) A 5.8 ohm resistor is connected in series to a pair of 2.8 ohm resistors that are in parallel.  What is the net resistance?


 * +a) 7.2 ohms.
 * -b) 8.3 ohms.
 * -c) 9.5 ohms.
 * -d) 11 ohms.
 * -e) 12.6 ohms.

4) What is consumer cost to operate one 56&minus;W incandescent bulb for 6 hours per day for 1 year (365 days) if the cost of electricity is $0.13 per kilowatt-hour?


 * -a) $1.198E+01
 * -b) $1.318E+01
 * -c) $1.449E+01
 * +d) $1.594E+01
 * -e) $1.754E+01

5) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 3.82 x 10-4m/s
 * -b) 4.63 x 10-4m/s
 * -c) 5.61 x 10-4m/s
 * -d) 6.8 x 10-4m/s
 * -e) 8.24 x 10-4m/s

6) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) None of these are true.
 * -b) $$4.5\Omega.$$
 * -c) $$3.5\Omega.$$
 * +d) $$2.5\Omega.$$

7) In the circuit shown V=16.2 V, R1=2.84 &Omega;, R2=7.06 &Omega;, and R3=13.1 &Omega;. What is the power dissipated by R2?


 * +a) 1.418E+01 W
 * -b) 1.560E+01 W
 * -c) 1.716E+01 W
 * -d) 1.887E+01 W
 * -e) 2.076E+01 W

8) A power supply delivers 101 watts of power to a 219 ohm resistor.  What was the applied voltage?


 * +a) 1.49 x 102 volts
 * -b) 1.8 x 102 volts
 * -c) 2.18 x 102 volts
 * -d) 2.64 x 102 volts
 * -e) 3.2 x 102 volts

9) An ideal 7.3 volt battery is connected to a 0.071 ohm resistor.  To measure the current an ammeter with a resistance of 27$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 49 A.
 * -b) 56.3 A.
 * -c) 64.8 A.
 * +d) 74.5 A.
 * -e) 85.7 A.

10) Three resistors, R1 = 0.672 &Omega;, and R2 = R2 = 1.52 &Omega;, are connected in parallel to a 5.34 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 2.898E+01 W
 * -b) 3.188E+01 W
 * -c) 3.507E+01 W
 * -d) 3.858E+01 W
 * +e) 4.243E+01 W

Key: N0
1) Calculate the electric field in a 12-gauge copper wire that is 84 m long and carries a current of 48 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 1.664E-04 V/m
 * -b) 1.830E-04 V/m
 * -c) 2.013E-04 V/m
 * -d) 2.215E-04 V/m
 * +e) 2.436E-04 V/m

2) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=63 C  and $$\tau=$$0.0149 s. What is the current at $$t=$$0.0172 s?


 * -a) 1.212E+03 A
 * +b) 1.333E+03 A
 * -c) 1.466E+03 A
 * -d) 1.613E+03 A
 * -e) 1.774E+03 A

3) Two sources of emf &epsilon;1=16.8 V, and  &epsilon;2=7.15 V are oriented as shownin the circuit. The resistances are R1=3.12 k&Omega; and  R2=1.51 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.95 mA and I4=0.603 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 4.108E+00 V
 * +b) 4.519E+00 V
 * -c) 4.970E+00 V
 * -d) 5.468E+00 V
 * -e) 6.014E+00 V

4) Three resistors, R1 = 0.87 &Omega;, and R2 = R2 = 2.0 &Omega;, are connected in parallel to a 8.57 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 6.977E+01 W
 * -b) 7.674E+01 W
 * +c) 8.442E+01 W
 * -d) 9.286E+01 W
 * -e) 1.021E+02 W

5) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 3.07 x 10-5m/s
 * -b) 3.72 x 10-5m/s
 * -c) 4.5 x 10-5m/s
 * -d) 5.46 x 10-5m/s
 * +e) 6.61 x 10-5m/s

6) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * -a) 2.61 x 10-2 W
 * -b) 3.16 x 10-2 W
 * +c) 3.83 x 10-2 W
 * -d) 4.64 x 10-2 W
 * -e) 5.62 x 10-2 W

7) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * -a) The other point could be Negative or positive.
 * -b) It's an Electrical Cliche.
 * -c) None these are correct
 * +d) Voltage is a measure of Electric Potential difference between two electrical points.

8) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * -a) None of these are true.
 * +b) $$R_{Total} = 6\Omega$$.
 * -c) $$R_{Total} = 3\Omega$$.
 * -d) $$R_{Total} = 0.5454\Omega$$.

9) A 8 ohm resistor is connected in series to a pair of 5.6 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 7.1 ohms.
 * -b) 8.2 ohms.
 * -c) 9.4 ohms.
 * +d) 10.8 ohms.
 * -e) 12.4 ohms.

10) An ideal 7.5 volt battery is connected to a 0.084 ohm resistor.  To measure the current an ammeter with a resistance of 14$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 43.8 A.
 * -b) 50.3 A.
 * -c) 57.9 A.
 * -d) 66.5 A.
 * +e) 76.5 A.

Key: N1
1) Three resistors, R1 = 1.23 &Omega;, and R2 = R2 = 2.73 &Omega;, are connected in parallel to a 5.41 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 1.788E+01 W
 * -b) 1.967E+01 W
 * -c) 2.163E+01 W
 * +d) 2.380E+01 W
 * -e) 2.617E+01 W

2) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=11.5 V are oriented as shownin the circuit. The resistances are R1=2.13 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.11 mA and I4=0.746 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 4.275E+00 V
 * -b) 4.703E+00 V
 * +c) 5.173E+00 V
 * -d) 5.691E+00 V
 * -e) 6.260E+00 V

3) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=85 C  and $$\tau=$$0.021 s. What is the current at $$t=$$0.0128 s?


 * -a) 1.503E+03 A
 * -b) 1.653E+03 A
 * -c) 1.818E+03 A
 * -d) 2.000E+03 A
 * +e) 2.200E+03 A

4) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * -a) 7.85 x 10-3 W
 * -b) 9.51 x 10-3 W
 * -c) 1.15 x 10-2 W
 * -d) 1.4 x 10-2 W
 * +e) 1.69 x 10-2 W

5) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 6.77 x 10-5m/s
 * -b) 8.2 x 10-5m/s
 * -c) 9.93 x 10-5m/s
 * +d) 1.2 x 10-4m/s
 * -e) 1.46 x 10-4m/s

6) An ideal 6.8 volt battery is connected to a 0.096 ohm resistor.  To measure the current an ammeter with a resistance of 29$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 35.8 A.
 * -b) 41.1 A.
 * -c) 47.3 A.
 * +d) 54.4 A.
 * -e) 62.6 A.

7) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * -a) The other point could be Negative or positive.
 * -b) It's an Electrical Cliche.
 * +c) Voltage is a measure of Electric Potential difference between two electrical points.
 * -d) None these are correct

8) Calculate the electric field in a 12-gauge copper wire that is 17 m long and carries a current of 56 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 1.941E-04 V/m
 * -b) 2.135E-04 V/m
 * -c) 2.349E-04 V/m
 * -d) 2.584E-04 V/m
 * +e) 2.842E-04 V/m

9) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * -a) $$R_{Total} = 0.5454\Omega$$.
 * +b) $$R_{Total} = 6\Omega$$.
 * -c) None of these are true.
 * -d) $$R_{Total} = 3\Omega$$.

10) A 6.3 ohm resistor is connected in series to a pair of 3.4 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 5.3 ohms.
 * -b) 6 ohms.
 * -c) 7 ohms.
 * +d) 8 ohms.
 * -e) 9.2 ohms.

Key: N2
1) Three resistors, R1 = 0.87 &Omega;, and R2 = R2 = 2.0 &Omega;, are connected in parallel to a 8.57 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 6.977E+01 W
 * -b) 7.674E+01 W
 * +c) 8.442E+01 W
 * -d) 9.286E+01 W
 * -e) 1.021E+02 W

2) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 2.77 x 10-5m/s
 * -b) 3.36 x 10-5m/s
 * -c) 4.06 x 10-5m/s
 * -d) 4.92 x 10-5m/s
 * -e) 5.97 x 10-5m/s

3) Two sources of emf &epsilon;1=38.8 V, and  &epsilon;2=14.9 V are oriented as shownin the circuit. The resistances are R1=5.83 k&Omega; and  R2=1.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.57 mA and I4=1.19 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 1.013E+01 V
 * -b) 1.115E+01 V
 * -c) 1.226E+01 V
 * +d) 1.349E+01 V
 * -e) 1.484E+01 V

4) Calculate the electric field in a 12-gauge copper wire that is 13 m long and carries a current of 59 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 2.250E-04 V/m
 * -b) 2.475E-04 V/m
 * -c) 2.722E-04 V/m
 * +d) 2.995E-04 V/m
 * -e) 3.294E-04 V/m

5) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * +a) Voltage is a measure of Electric Potential difference between two electrical points.
 * -b) It's an Electrical Cliche.
 * -c) The other point could be Negative or positive.
 * -d) None these are correct

6) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * -a) None of these are true.
 * -b) $$R_{Total} = 3\Omega$$.
 * +c) $$R_{Total} = 6\Omega$$.
 * -d) $$R_{Total} = 0.5454\Omega$$.

7) An ideal 5.7 volt battery is connected to a 0.091 ohm resistor.  To measure the current an ammeter with a resistance of 23$$m\Omega$$ is used.  What current does the ammeter actually read?


 * +a) 50 A.
 * -b) 57.5 A.
 * -c) 66.1 A.
 * -d) 76 A.
 * -e) 87.5 A.

8) A 5.6 ohm resistor is connected in series to a pair of 7.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 7 ohms.
 * -b) 8 ohms.
 * +c) 9.2 ohms.
 * -d) 10.6 ohms.
 * -e) 12.2 ohms.

9) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * -a) 7.85 x 10-3 W
 * -b) 9.51 x 10-3 W
 * -c) 1.15 x 10-2 W
 * -d) 1.4 x 10-2 W
 * +e) 1.69 x 10-2 W

10) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=97 C  and $$\tau=$$0.0132 s. What is the current at $$t=$$0.0225 s?


 * +a) 1.336E+03 A
 * -b) 1.470E+03 A
 * -c) 1.617E+03 A
 * -d) 1.779E+03 A
 * -e) 1.957E+03 A

Key: O0
1) A DC winch moter draws 25 amps at 119 volts as it lifts a 4.730E+03 N weight at a constant speed of 0.47 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 1.094E+00 &Omega;
 * +b) 1.203E+00 &Omega;
 * -c) 1.323E+00 &Omega;
 * -d) 1.456E+00 &Omega;
 * -e) 1.601E+00 &Omega;

2) What is consumer cost to operate one 77&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.124 per kilowatt-hour?


 * -a) $3.142E+01
 * -b) $3.456E+01
 * -c) $3.802E+01
 * +d) $4.182E+01
 * -e) $4.600E+01

3) A battery with a terminal voltage of 10.7 V is connected to a circuit consisting of 2 24.5 &Omega; resistors and one 15.2 &Omega; resistor. What is the voltage drop across the 15.2 &Omega; resistor?


 * -a) 1.730E+00 V
 * -b) 1.903E+00 V
 * -c) 2.094E+00 V
 * -d) 2.303E+00 V
 * +e) 2.533E+00 V

4) Three resistors, R1 = 0.855 &Omega;, and R2 = R2 = 1.91 &Omega;, are connected in parallel to a 6.97 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * +a) 5.682E+01 W
 * -b) 6.250E+01 W
 * -c) 6.875E+01 W
 * -d) 7.563E+01 W
 * -e) 8.319E+01 W

5) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * -a) 4.14 x 10-2 W
 * +b) 5.02 x 10-2 W
 * -c) 6.08 x 10-2 W
 * -d) 7.37 x 10-2 W
 * -e) 8.93 x 10-2 W

6) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * -a) 5.42 x 102 &Omega;
 * -b) 6.57 x 102 &Omega;
 * -c) 7.95 x 102 &Omega;
 * +d) 9.64 x 102 &Omega;
 * -e) 1.17 x 103 &Omega;

7) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * +a) 2A
 * -b) 12A
 * -c) 3A
 * -d) 1.5A

8) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) $$4.5\Omega.$$
 * -b) $$3.5\Omega.$$
 * +c) $$2.5\Omega.$$
 * -d) None of these are true.

9) A 5.7 ohm resistor is connected in series to a pair of 3.8 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 5 ohms.
 * -b) 5.7 ohms.
 * -c) 6.6 ohms.
 * +d) 7.6 ohms.
 * -e) 8.7 ohms.

10) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.6 ohm resistor.  What is the net resistance?


 * -a) 3.7 ohms.
 * -b) 4.3 ohms.
 * -c) 5 ohms.
 * +d) 5.7 ohms.
 * -e) 6.6 ohms.

Key: O1
1) A battery with a terminal voltage of 8.66 V is connected to a circuit consisting of 3 19.6 &Omega; resistors and one 10.6 &Omega; resistor. What is the voltage drop across the 10.6 &Omega; resistor?


 * -a) 1.202E+00 V
 * +b) 1.323E+00 V
 * -c) 1.455E+00 V
 * -d) 1.600E+00 V
 * -e) 1.761E+00 V

2) A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?


 * +a) 4.06 x 10-2 W
 * -b) 4.92 x 10-2 W
 * -c) 5.96 x 10-2 W
 * -d) 7.22 x 10-2 W
 * -e) 8.75 x 10-2 W

3) Three resistors, R1 = 0.624 &Omega;, and R2 = R2 = 1.37 &Omega;, are connected in parallel to a 7.46 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 7.371E+01 W
 * -b) 8.108E+01 W
 * +c) 8.919E+01 W
 * -d) 9.810E+01 W
 * -e) 1.079E+02 W

4) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * -a) 2.2 x 103 &Omega;
 * +b) 2.67 x 103 &Omega;
 * -c) 3.23 x 103 &Omega;
 * -d) 3.91 x 103 &Omega;
 * -e) 4.74 x 103 &Omega;

5) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * -a) 12A
 * -b) 1.5A
 * -c) 3A
 * +d) 2A

6) A DC winch moter draws 25 amps at 119 volts as it lifts a 4.730E+03 N weight at a constant speed of 0.47 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 1.094E+00 &Omega;
 * +b) 1.203E+00 &Omega;
 * -c) 1.323E+00 &Omega;
 * -d) 1.456E+00 &Omega;
 * -e) 1.601E+00 &Omega;

7) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * +a) 6.5 ohms.
 * -b) 7.5 ohms.
 * -c) 8.6 ohms.
 * -d) 9.9 ohms.
 * -e) 11.4 ohms.

8) What is consumer cost to operate one 57&minus;W incandescent bulb for 11 hours per day for 1 year (365 days) if the cost of electricity is $0.146 per kilowatt-hour?


 * -a) $2.282E+01
 * -b) $2.510E+01
 * -c) $2.761E+01
 * -d) $3.038E+01
 * +e) $3.341E+01

9) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) $$3.5\Omega.$$
 * -b) $$4.5\Omega.$$
 * -c) None of these are true.
 * +d) $$2.5\Omega.$$

10) A 5.6 ohm resistor is connected in series to a pair of 7.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 7 ohms.
 * -b) 8 ohms.
 * +c) 9.2 ohms.
 * -d) 10.6 ohms.
 * -e) 12.2 ohms.

Key: O2
1) A battery with a terminal voltage of 13.2 V is connected to a circuit consisting of 3 15.7 &Omega; resistors and one 10.3 &Omega; resistor. What is the voltage drop across the 10.3 &Omega; resistor?


 * -a) 1.958E+00 V
 * -b) 2.153E+00 V
 * +c) 2.369E+00 V
 * -d) 2.606E+00 V
 * -e) 2.866E+00 V

2) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * -a) 2.28 x 103 &Omega;
 * +b) 2.76 x 103 &Omega;
 * -c) 3.34 x 103 &Omega;
 * -d) 4.05 x 103 &Omega;
 * -e) 4.91 x 103 &Omega;

3) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * -a) 4.14 x 10-2 W
 * +b) 5.02 x 10-2 W
 * -c) 6.08 x 10-2 W
 * -d) 7.37 x 10-2 W
 * -e) 8.93 x 10-2 W

4) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?
 * -a) 1.5A
 * -b) 12A
 * -c) 3A
 * +d) 2A

5) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) $$3.5\Omega.$$
 * -b) None of these are true.
 * +c) $$2.5\Omega.$$
 * -d) $$4.5\Omega.$$

6) Three resistors, R1 = 0.624 &Omega;, and R2 = R2 = 1.37 &Omega;, are connected in parallel to a 7.46 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 7.371E+01 W
 * -b) 8.108E+01 W
 * +c) 8.919E+01 W
 * -d) 9.810E+01 W
 * -e) 1.079E+02 W

7) Two 9.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * -a) 5.4 ohms.
 * -b) 6.2 ohms.
 * +c) 7.1 ohms.
 * -d) 8.2 ohms.
 * -e) 9.4 ohms.

8) What is consumer cost to operate one 102&minus;W incandescent bulb for 5 hours per day for 1 year (365 days) if the cost of electricity is $0.149 per kilowatt-hour?


 * -a) $2.292E+01
 * -b) $2.521E+01
 * +c) $2.774E+01
 * -d) $3.051E+01
 * -e) $3.356E+01

9) A DC winch moter draws 20 amps at 157 volts as it lifts a 5.270E+03 N weight at a constant speed of 0.403 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * +a) 2.540E+00 &Omega;
 * -b) 2.795E+00 &Omega;
 * -c) 3.074E+00 &Omega;
 * -d) 3.381E+00 &Omega;
 * -e) 3.720E+00 &Omega;

10) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 8.3 ohms.
 * -b) 9.6 ohms.
 * +c) 11 ohms.
 * -d) 12.7 ohms.
 * -e) 14.5 ohms.

Key: P0
1) Calculate the electric field in a 12-gauge copper wire that is 62 m long and carries a current of 52 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 1.983E-04 V/m
 * -b) 2.181E-04 V/m
 * -c) 2.399E-04 V/m
 * +d) 2.639E-04 V/m
 * -e) 2.903E-04 V/m

2) A DC winch moter draws 23 amps at 170 volts as it lifts a 5.200E+03 N weight at a constant speed of 0.662 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 7.305E-01 &Omega;
 * -b) 8.036E-01 &Omega;
 * +c) 8.839E-01 &Omega;
 * -d) 9.723E-01 &Omega;
 * -e) 1.070E+00 &Omega;

3) Two sources of emf &epsilon;1=27.1 V, and  &epsilon;2=8.04 V are oriented as shownin the circuit. The resistances are R1=2.94 k&Omega; and  R2=1.61 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.87 mA and I4=0.57 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 8.482E+00 V
 * +b) 9.330E+00 V
 * -c) 1.026E+01 V
 * -d) 1.129E+01 V
 * -e) 1.242E+01 V

4) A battery with a terminal voltage of 9.88 V is connected to a circuit consisting of 3 15.9 &Omega; resistors and one 10.8 &Omega; resistor. What is the voltage drop across the 10.8 &Omega; resistor?


 * -a) 1.370E+00 V
 * -b) 1.507E+00 V
 * -c) 1.658E+00 V
 * +d) 1.824E+00 V
 * -e) 2.006E+00 V

5) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * +a) 4.43 x 10-2 W
 * -b) 5.37 x 10-2 W
 * -c) 6.51 x 10-2 W
 * -d) 7.88 x 10-2 W
 * -e) 9.55 x 10-2 W

6) The diameter of a copper wire is 9.2 mm, and it carries a current of 64 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 4.91 x 10-5m/s
 * -b) 5.95 x 10-5m/s
 * +c) 7.2 x 10-5m/s
 * -d) 8.73 x 10-5m/s
 * -e) 1.06 x 10-4m/s

7) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) None of these are true.
 * -b) $$3.5\Omega.$$
 * +c) $$2.5\Omega.$$
 * -d) $$4.5\Omega.$$

8) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * +a) The voltage across both resistors is the same as the source.
 * -b) None of these are true.
 * -c) The voltage across both resistors is half the voltage of the source.
 * -d) One has full voltage, the other has none.

9) A battery has an emf of 6.5 volts, and an internal resistance of 446 $$k\Omega$$. It is connected to a 3.5 $$M\Omega$$ resistor.  What power is developed in the 3.5  $$M\Omega$$ resistor?


 * -a) 8.26 $$\mu$$W.
 * +b) 9.5 $$\mu$$W.
 * -c) 10.92 $$\mu$$W.
 * -d) 12.56 $$\mu$$W.
 * -e) 14.44 $$\mu$$W.

10) An ideal 6.4 volt battery is connected to a 0.071 ohm resistor.  To measure the current an ammeter with a resistance of 21$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 60.5 A.
 * +b) 69.6 A.
 * -c) 80 A.
 * -d) 92 A.
 * -e) 105.8 A.

Key: P1
1) Calculate the electric field in a 12-gauge copper wire that is 25 m long and carries a current of 43 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 2.182E-04 V/m
 * -b) 2.401E-04 V/m
 * -c) 2.641E-04 V/m
 * -d) 2.905E-04 V/m
 * -e) 3.195E-04 V/m

2) An ideal 7.3 volt battery is connected to a 0.071 ohm resistor.  To measure the current an ammeter with a resistance of 27$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 49 A.
 * -b) 56.3 A.
 * -c) 64.8 A.
 * +d) 74.5 A.
 * -e) 85.7 A.

3) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 3.07 x 10-5m/s
 * -b) 3.72 x 10-5m/s
 * -c) 4.5 x 10-5m/s
 * -d) 5.46 x 10-5m/s
 * +e) 6.61 x 10-5m/s

4) A DC winch moter draws 29 amps at 153 volts as it lifts a 4.780E+03 N weight at a constant speed of 0.691 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 1.226E+00 &Omega;
 * +b) 1.348E+00 &Omega;
 * -c) 1.483E+00 &Omega;
 * -d) 1.632E+00 &Omega;
 * -e) 1.795E+00 &Omega;

5) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * -a) 2.61 x 10-2 W
 * -b) 3.16 x 10-2 W
 * +c) 3.83 x 10-2 W
 * -d) 4.64 x 10-2 W
 * -e) 5.62 x 10-2 W

6) A battery with a terminal voltage of 8.01 V is connected to a circuit consisting of 3 22.1 &Omega; resistors and one 14.5 &Omega; resistor. What is the voltage drop across the 14.5 &Omega; resistor?


 * -a) 9.818E-01 V
 * -b) 1.080E+00 V
 * -c) 1.188E+00 V
 * -d) 1.307E+00 V
 * +e) 1.437E+00 V

7) A battery has an emf of 5.6 volts, and an internal resistance of 450 $$k\Omega$$. It is connected to a 2.7 $$M\Omega$$ resistor.  What power is developed in the 2.7  $$M\Omega$$ resistor?


 * -a) 4.88 $$\mu$$W.
 * -b) 5.61 $$\mu$$W.
 * -c) 6.45 $$\mu$$W.
 * -d) 7.42 $$\mu$$W.
 * +e) 8.53 $$\mu$$W.

8) Two sources of emf &epsilon;1=27.1 V, and  &epsilon;2=8.04 V are oriented as shownin the circuit. The resistances are R1=2.94 k&Omega; and  R2=1.61 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.87 mA and I4=0.57 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 8.482E+00 V
 * +b) 9.330E+00 V
 * -c) 1.026E+01 V
 * -d) 1.129E+01 V
 * -e) 1.242E+01 V

9) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) $$3.5\Omega.$$
 * -b) None of these are true.
 * -c) $$4.5\Omega.$$
 * +d) $$2.5\Omega.$$

10) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * -a) The voltage across both resistors is half the voltage of the source.
 * -b) None of these are true.
 * -c) One has full voltage, the other has none.
 * +d) The voltage across both resistors is the same as the source.

Key: P2
1) Two resistors are in parallel with a voltage source. How do their voltages compare?
 * -a) The voltage across both resistors is half the voltage of the source.
 * +b) The voltage across both resistors is the same as the source.
 * -c) None of these are true.
 * -d) One has full voltage, the other has none.

2) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * -a) 4.14 x 10-2 W
 * +b) 5.02 x 10-2 W
 * -c) 6.08 x 10-2 W
 * -d) 7.37 x 10-2 W
 * -e) 8.93 x 10-2 W

3) An ideal 5.9 volt battery is connected to a 0.059 ohm resistor.  To measure the current an ammeter with a resistance of 24$$m\Omega$$ is used.  What current does the ammeter actually read?


 * +a) 71.1 A.
 * -b) 81.7 A.
 * -c) 94 A.
 * -d) 108.1 A.
 * -e) 124.3 A.

4) A battery with a terminal voltage of 8.14 V is connected to a circuit consisting of 2 21.5 &Omega; resistors and one 13.1 &Omega; resistor. What is the voltage drop across the 13.1 &Omega; resistor?


 * -a) 1.298E+00 V
 * -b) 1.428E+00 V
 * -c) 1.571E+00 V
 * -d) 1.728E+00 V
 * +e) 1.901E+00 V

5) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) $$3.5\Omega.$$
 * -b) None of these are true.
 * -c) $$4.5\Omega.$$
 * +d) $$2.5\Omega.$$

6) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 3.82 x 10-4m/s
 * -b) 4.63 x 10-4m/s
 * -c) 5.61 x 10-4m/s
 * -d) 6.8 x 10-4m/s
 * -e) 8.24 x 10-4m/s

7) Two sources of emf &epsilon;1=52.7 V, and  &epsilon;2=17.5 V are oriented as shownin the circuit. The resistances are R1=5.86 k&Omega; and  R2=2.08 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.48 mA and I4=0.988 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * +a) 2.064E+01 V
 * -b) 2.270E+01 V
 * -c) 2.497E+01 V
 * -d) 2.747E+01 V
 * -e) 3.021E+01 V

8) A DC winch moter draws 18 amps at 126 volts as it lifts a 5.830E+03 N weight at a constant speed of 0.26 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 1.919E+00 &Omega;
 * -b) 2.111E+00 &Omega;
 * +c) 2.322E+00 &Omega;
 * -d) 2.554E+00 &Omega;
 * -e) 2.809E+00 &Omega;

9) A battery has an emf of 5.6 volts, and an internal resistance of 450 $$k\Omega$$. It is connected to a 2.7 $$M\Omega$$ resistor.  What power is developed in the 2.7  $$M\Omega$$ resistor?


 * -a) 4.88 $$\mu$$W.
 * -b) 5.61 $$\mu$$W.
 * -c) 6.45 $$\mu$$W.
 * -d) 7.42 $$\mu$$W.
 * +e) 8.53 $$\mu$$W.

10) Calculate the electric field in a 12-gauge copper wire that is 56 m long and carries a current of 81 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 4.111E-04 V/m
 * -b) 4.522E-04 V/m
 * -c) 4.975E-04 V/m
 * -d) 5.472E-04 V/m
 * -e) 6.019E-04 V/m

Key: Q0
1) A DC winch moter draws 20 amps at 169 volts as it lifts a 5.120E+03 N weight at a constant speed of 0.543 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * +a) 1.500E+00 &Omega;
 * -b) 1.650E+00 &Omega;
 * -c) 1.815E+00 &Omega;
 * -d) 1.996E+00 &Omega;
 * -e) 2.196E+00 &Omega;

2) Calculate the electric field in a 12-gauge copper wire that is 15 m long and carries a current of 85 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 2.947E-04 V/m
 * -b) 3.241E-04 V/m
 * -c) 3.565E-04 V/m
 * -d) 3.922E-04 V/m
 * +e) 4.314E-04 V/m

3) Two sources of emf &epsilon;1=24.9 V, and  &epsilon;2=10.1 V are oriented as shownin the circuit. The resistances are R1=2.32 k&Omega; and  R2=2.31 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.74 mA and I4=0.444 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 1.725E+00 mA
 * -b) 1.898E+00 mA
 * -c) 2.087E+00 mA
 * +d) 2.296E+00 mA
 * -e) 2.526E+00 mA

4) Two sources of emf &epsilon;1=58.5 V, and  &epsilon;2=17.3 V are oriented as shownin the circuit. The resistances are R1=3.06 k&Omega; and  R2=1.88 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=5.25 mA and I4=1.25 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * -a) 1.981E+01 V
 * +b) 2.179E+01 V
 * -c) 2.397E+01 V
 * -d) 2.637E+01 V
 * -e) 2.901E+01 V

5) A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?


 * +a) 4.06 x 10-2 W
 * -b) 4.92 x 10-2 W
 * -c) 5.96 x 10-2 W
 * -d) 7.22 x 10-2 W
 * -e) 8.75 x 10-2 W

6) A power supply delivers 101 watts of power to a 219 ohm resistor.  What was the applied voltage?


 * +a) 1.49 x 102 volts
 * -b) 1.8 x 102 volts
 * -c) 2.18 x 102 volts
 * -d) 2.64 x 102 volts
 * -e) 3.2 x 102 volts

7) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * +a) $$2.5\Omega.$$
 * -b) $$4.5\Omega.$$
 * -c) None of these are true.
 * -d) $$3.5\Omega.$$

8) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{7}{11}\Omega$$.
 * -b) $$\frac{10}{21}\Omega$$.
 * +c) $$\frac{21}{10}\Omega$$.
 * -d) $$\frac{11}{7}\Omega$$.

9) A 5.9 ohm resistor is connected in series to a pair of 3 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 5.6 ohms.
 * -b) 6.4 ohms.
 * +c) 7.4 ohms.
 * -d) 8.5 ohms.
 * -e) 9.8 ohms.

10) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * +a) 9.9 ohms.
 * -b) 11.4 ohms.
 * -c) 13.1 ohms.
 * -d) 15.1 ohms.
 * -e) 17.3 ohms.

Key: Q1
1) Two sources of emf &epsilon;1=45.3 V, and  &epsilon;2=13.3 V are oriented as shownin the circuit. The resistances are R1=3.82 k&Omega; and  R2=1.5 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=6.17 mA and I4=1.11 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * -a) 1.177E+01 V
 * -b) 1.295E+01 V
 * -c) 1.424E+01 V
 * +d) 1.567E+01 V
 * -e) 1.723E+01 V

2) A 3.1 volt battery moves 52 Coulombs of charge in 1.7 hours. What is the power?


 * -a) 1.79 x 10-2 W
 * -b) 2.17 x 10-2 W
 * +c) 2.63 x 10-2 W
 * -d) 3.19 x 10-2 W
 * -e) 3.87 x 10-2 W

3) Two 9.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * -a) 5.4 ohms.
 * -b) 6.2 ohms.
 * +c) 7.1 ohms.
 * -d) 8.2 ohms.
 * -e) 9.4 ohms.

4) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.1 ohms.
 * -b) 7 ohms.
 * -c) 8.1 ohms.
 * -d) 9.3 ohms.
 * +e) 10.7 ohms.

5) Two sources of emf &epsilon;1=38.9 V, and  &epsilon;2=15.7 V are oriented as shownin the circuit. The resistances are R1=2.24 k&Omega; and  R2=2.23 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.01 mA and I4=0.86 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 1.955E+00 mA
 * +b) 2.150E+00 mA
 * -c) 2.365E+00 mA
 * -d) 2.601E+00 mA
 * -e) 2.862E+00 mA

6) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{10}{21}\Omega$$.
 * -b) $$\frac{11}{7}\Omega$$.
 * +c) $$\frac{21}{10}\Omega$$.
 * -d) $$\frac{7}{11}\Omega$$.

7) Calculate the electric field in a 12-gauge copper wire that is 48 m long and carries a current of 63 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 3.198E-04 V/m
 * -b) 3.517E-04 V/m
 * -c) 3.869E-04 V/m
 * -d) 4.256E-04 V/m
 * -e) 4.682E-04 V/m

8) A power supply delivers 114 watts of power to a 294 ohm resistor.  What was the applied voltage?


 * -a) 1.25 x 102 volts
 * -b) 1.51 x 102 volts
 * +c) 1.83 x 102 volts
 * -d) 2.22 x 102 volts
 * -e) 2.69 x 102 volts

9) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) $$3.5\Omega.$$
 * -b) $$4.5\Omega.$$
 * -c) None of these are true.
 * +d) $$2.5\Omega.$$

10) A DC winch moter draws 25 amps at 128 volts as it lifts a 5.710E+03 N weight at a constant speed of 0.449 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 8.413E-01 &Omega;
 * -b) 9.254E-01 &Omega;
 * +c) 1.018E+00 &Omega;
 * -d) 1.120E+00 &Omega;
 * -e) 1.232E+00 &Omega;

Key: Q2
1) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{10}{21}\Omega$$.
 * -b) $$\frac{11}{7}\Omega$$.
 * -c) $$\frac{7}{11}\Omega$$.
 * +d) $$\frac{21}{10}\Omega$$.

2) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) None of these are true.
 * -b) $$4.5\Omega.$$
 * -c) $$3.5\Omega.$$
 * +d) $$2.5\Omega.$$

3) A 4 volt battery moves 19 Coulombs of charge in 1.3 hours. What is the power?


 * +a) 1.62 x 10-2 W
 * -b) 1.97 x 10-2 W
 * -c) 2.38 x 10-2 W
 * -d) 2.89 x 10-2 W
 * -e) 3.5 x 10-2 W

4) A DC winch moter draws 23 amps at 170 volts as it lifts a 5.200E+03 N weight at a constant speed of 0.662 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 7.305E-01 &Omega;
 * -b) 8.036E-01 &Omega;
 * +c) 8.839E-01 &Omega;
 * -d) 9.723E-01 &Omega;
 * -e) 1.070E+00 &Omega;

5) Calculate the electric field in a 12-gauge copper wire that is 48 m long and carries a current of 63 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 3.198E-04 V/m
 * -b) 3.517E-04 V/m
 * -c) 3.869E-04 V/m
 * -d) 4.256E-04 V/m
 * -e) 4.682E-04 V/m

6) Two sources of emf &epsilon;1=49.6 V, and  &epsilon;2=19.3 V are oriented as shownin the circuit. The resistances are R1=4.87 k&Omega; and  R2=2.81 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.37 mA and I4=1.01 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 3.055E+00 mA
 * +b) 3.360E+00 mA
 * -c) 3.696E+00 mA
 * -d) 4.066E+00 mA
 * -e) 4.472E+00 mA

7) A power supply delivers 145 watts of power to a 244 ohm resistor.  What was the applied voltage?


 * +a) 1.88 x 102 volts
 * -b) 2.28 x 102 volts
 * -c) 2.76 x 102 volts
 * -d) 3.34 x 102 volts
 * -e) 4.05 x 102 volts

8) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.1 ohms.
 * -b) 7 ohms.
 * -c) 8.1 ohms.
 * -d) 9.3 ohms.
 * +e) 10.7 ohms.

9) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * +a) 6.5 ohms.
 * -b) 7.5 ohms.
 * -c) 8.6 ohms.
 * -d) 9.9 ohms.
 * -e) 11.4 ohms.

10) Two sources of emf &epsilon;1=39.4 V, and  &epsilon;2=12.2 V are oriented as shownin the circuit. The resistances are R1=3.84 k&Omega; and  R2=2.01 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.71 mA and I4=0.669 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * -a) 8.825E+00 V
 * -b) 9.708E+00 V
 * -c) 1.068E+01 V
 * -d) 1.175E+01 V
 * +e) 1.292E+01 V

Key: R0
1) What is consumer cost to operate one 65&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.134 per kilowatt-hour?


 * -a) $2.866E+01
 * -b) $3.153E+01
 * -c) $3.468E+01
 * +d) $3.815E+01
 * -e) $4.196E+01

2) A make-believe metal has a density of 6.650E+03 kg/m3 and an atomic mass of 67.5 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * -a) 4.456E+28 e&minus;/m3
 * -b) 4.901E+28 e&minus;/m3
 * -c) 5.392E+28 e&minus;/m3
 * +d) 5.931E+28 e&minus;/m3
 * -e) 6.524E+28 e&minus;/m3

3) Three resistors, R1 = 0.61 &Omega;, and R2 = R2 = 1.35 &Omega;, are connected in parallel to a 7.04 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 7.386E+01 W
 * +b) 8.125E+01 W
 * -c) 8.937E+01 W
 * -d) 9.831E+01 W
 * -e) 1.081E+02 W

4) Two sources of emf &epsilon;1=13.6 V, and  &epsilon;2=6.53 V are oriented as shownin the circuit. The resistances are R1=2.89 k&Omega; and  R2=2.12 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.11 mA and I4=0.311 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 7.264E-01 mA
 * +b) 7.990E-01 mA
 * -c) 8.789E-01 mA
 * -d) 9.668E-01 mA
 * -e) 1.063E+00 mA

5) A 195 Watt DC motor draws 0.49 amps of current. What is effective resistance?


 * +a) 8.12 x 102 &Omega;
 * -b) 9.84 x 102 &Omega;
 * -c) 1.19 x 103 &Omega;
 * -d) 1.44 x 103 &Omega;
 * -e) 1.75 x 103 &Omega;

6) A power supply delivers 138 watts of power to a 206 ohm resistor.  What was the applied voltage?


 * -a) 1.39 x 102 volts
 * +b) 1.69 x 102 volts
 * -c) 2.04 x 102 volts
 * -d) 2.47 x 102 volts
 * -e) 3 x 102 volts

7) What is the current through R1 and R2 in the figure shown?
 * +a) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * -b) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * -c) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * -d) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.

8) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{6}{3}\Omega$$.
 * -b) $$\frac{3}{6}\Omega$$.
 * +c) $$\frac{6}{11}\Omega$$.
 * -d) $$\frac{11}{6}\Omega$$.

9) A battery has an emf of 5.5 volts, and an internal resistance of 296 $$k\Omega$$. It is connected to a 3.3 $$M\Omega$$ resistor.  What power is developed in the 3.3  $$M\Omega$$ resistor?


 * +a) 7.72 $$\mu$$W.
 * -b) 8.88 $$\mu$$W.
 * -c) 10.21 $$\mu$$W.
 * -d) 11.74 $$\mu$$W.
 * -e) 13.5 $$\mu$$W.

10) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * +a) 9.9 ohms.
 * -b) 11.4 ohms.
 * -c) 13.1 ohms.
 * -d) 15.1 ohms.
 * -e) 17.3 ohms.

Key: R1
1) What is consumer cost to operate one 65&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.134 per kilowatt-hour?


 * -a) $2.866E+01
 * -b) $3.153E+01
 * -c) $3.468E+01
 * +d) $3.815E+01
 * -e) $4.196E+01

2) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * -a) 7.09 $$\mu$$W.
 * -b) 8.16 $$\mu$$W.
 * +c) 9.38 $$\mu$$W.
 * -d) 10.79 $$\mu$$W.
 * -e) 12.41 $$\mu$$W.

3) Two sources of emf &epsilon;1=43.7 V, and  &epsilon;2=13.1 V are oriented as shownin the circuit. The resistances are R1=5.21 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.86 mA and I4=0.9 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 2.691E+00 mA
 * +b) 2.960E+00 mA
 * -c) 3.256E+00 mA
 * -d) 3.582E+00 mA
 * -e) 3.940E+00 mA

4) A make-believe metal has a density of 1.810E+04 kg/m3 and an atomic mass of 14.0 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * -a) 5.847E+29 e&minus;/m3
 * -b) 6.432E+29 e&minus;/m3
 * -c) 7.075E+29 e&minus;/m3
 * +d) 7.783E+29 e&minus;/m3
 * -e) 8.561E+29 e&minus;/m3

5) What is the current through R1 and R2 in the figure shown?
 * +a) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * -b) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * -c) $$I_1 = 1A$$ and $$I_2 = 25A$$.
 * -d) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.

6) Three resistors, R1 = 0.548 &Omega;, and R2 = R2 = 1.24 &Omega;, are connected in parallel to a 7.16 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 7.029E+01 W
 * -b) 7.731E+01 W
 * -c) 8.505E+01 W
 * +d) 9.355E+01 W
 * -e) 1.029E+02 W

7) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * -a) 2.28 x 103 &Omega;
 * +b) 2.76 x 103 &Omega;
 * -c) 3.34 x 103 &Omega;
 * -d) 4.05 x 103 &Omega;
 * -e) 4.91 x 103 &Omega;

8) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * +a) 6.5 ohms.
 * -b) 7.5 ohms.
 * -c) 8.6 ohms.
 * -d) 9.9 ohms.
 * -e) 11.4 ohms.

9) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in parallel. What is the total resistance?
 * +a) $$\frac{6}{11}\Omega$$.
 * -b) $$\frac{6}{3}\Omega$$.
 * -c) $$\frac{3}{6}\Omega$$.
 * -d) $$\frac{11}{6}\Omega$$.

10) A power supply delivers 187 watts of power to a 287 ohm resistor.  What was the applied voltage?


 * +a) 2.32 x 102 volts
 * -b) 2.81 x 102 volts
 * -c) 3.4 x 102 volts
 * -d) 4.12 x 102 volts
 * -e) 4.99 x 102 volts

Key: R2
1) A make-believe metal has a density of 3.230E+03 kg/m3 and an atomic mass of 116.0 g/mol. Taking Avogadro's number to be 6.020E+23 atoms/mol and assuming one free electron per atom, calculate the number of free electrons per cubic meter.


 * -a) 1.385E+28 e&minus;/m3
 * -b) 1.524E+28 e&minus;/m3
 * +c) 1.676E+28 e&minus;/m3
 * -d) 1.844E+28 e&minus;/m3
 * -e) 2.028E+28 e&minus;/m3

2) Three resistors, R1 = 1.82 &Omega;, and R2 = R2 = 4.14 &Omega;, are connected in parallel to a 5.65 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * +a) 1.754E+01 W
 * -b) 1.929E+01 W
 * -c) 2.122E+01 W
 * -d) 2.335E+01 W
 * -e) 2.568E+01 W

3) Two sources of emf &epsilon;1=39.0 V, and  &epsilon;2=15.9 V are oriented as shownin the circuit. The resistances are R1=3.4 k&Omega; and  R2=2.12 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.58 mA and I4=0.978 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 2.150E+00 mA
 * -b) 2.365E+00 mA
 * +c) 2.602E+00 mA
 * -d) 2.862E+00 mA
 * -e) 3.148E+00 mA

4) A battery has an emf of 5.6 volts, and an internal resistance of 295 $$k\Omega$$. It is connected to a 4.1 $$M\Omega$$ resistor.  What power is developed in the 4.1  $$M\Omega$$ resistor?


 * -a) 3.81 $$\mu$$W.
 * -b) 4.38 $$\mu$$W.
 * -c) 5.03 $$\mu$$W.
 * -d) 5.79 $$\mu$$W.
 * +e) 6.66 $$\mu$$W.

5) Two 6.6 ohm resistors are connected in parallel.  This combination is then connected in series to a 3.4 ohm resistor.  What is the net resistance?


 * -a) 4.4 ohms.
 * -b) 5.1 ohms.
 * -c) 5.8 ohms.
 * +d) 6.7 ohms.
 * -e) 7.7 ohms.

6) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * -a) 2.28 x 103 &Omega;
 * +b) 2.76 x 103 &Omega;
 * -c) 3.34 x 103 &Omega;
 * -d) 4.05 x 103 &Omega;
 * -e) 4.91 x 103 &Omega;

7) A power supply delivers 187 watts of power to a 287 ohm resistor.  What was the applied voltage?


 * +a) 2.32 x 102 volts
 * -b) 2.81 x 102 volts
 * -c) 3.4 x 102 volts
 * -d) 4.12 x 102 volts
 * -e) 4.99 x 102 volts

8) What is the current through R1 and R2 in the figure shown?
 * -a) $$I_1 = 10A$$ and $$I_2 = 16.67A$$.
 * +b) $$I_1 = 1A$$ and $$I_2 = 1.667A$$.
 * -c) $$I_1 = 0.1A$$ and $$I_2 = 0.1667A$$.
 * -d) $$I_1 = 1A$$ and $$I_2 = 25A$$.

9) What is consumer cost to operate one 59&minus;W incandescent bulb for 10 hours per day for 1 year (365 days) if the cost of electricity is $0.132 per kilowatt-hour?


 * -a) $2.584E+01
 * +b) $2.843E+01
 * -c) $3.127E+01
 * -d) $3.440E+01
 * -e) $3.784E+01

10) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{6}{3}\Omega$$.
 * -b) $$\frac{11}{6}\Omega$$.
 * -c) $$\frac{3}{6}\Omega$$.
 * +d) $$\frac{6}{11}\Omega$$.

Key: S0
1) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=16 C  and $$\tau=$$0.0214 s. What is the current at $$t=$$0.0207 s?


 * -a) 2.135E+02 A
 * -b) 2.349E+02 A
 * -c) 2.584E+02 A
 * +d) 2.842E+02 A
 * -e) 3.126E+02 A

2) Imagine a substance could be made into a very hot filament. Suppose the resitance is 1.56 &Omega; at a temperature of 97&deg;C and that the temperature coefficient of expansion is 5.020E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 340 &deg;C?


 * +a) 3.463E+00 &Omega;
 * -b) 3.636E+00 &Omega;
 * -c) 3.818E+00 &Omega;
 * -d) 4.009E+00 &Omega;
 * -e) 4.209E+00 &Omega;

3) The resistances in the figure shown are R1= 2.49 &Omega;, R2= 1.72 &Omega;, and R2= 3.58 &Omega;. V1 and V3 are text 0.417 V and 1.83 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.53 V. What is the absolute value of the current through R1?


 * -a) 8.220E-02 A
 * -b) 9.042E-02 A
 * -c) 9.946E-02 A
 * +d) 1.094E-01 A
 * -e) 1.203E-01 A

4) Three resistors, R1 = 1.41 &Omega;, and R2 = R2 = 3.17 &Omega;, are connected in parallel to a 5.89 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 1.681E+01 W
 * -b) 1.849E+01 W
 * -c) 2.033E+01 W
 * -d) 2.237E+01 W
 * +e) 2.460E+01 W

5) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * -a) 2.61 x 10-2 W
 * -b) 3.16 x 10-2 W
 * +c) 3.83 x 10-2 W
 * -d) 4.64 x 10-2 W
 * -e) 5.62 x 10-2 W

6) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * -a) 2.2 x 103 &Omega;
 * +b) 2.67 x 103 &Omega;
 * -c) 3.23 x 103 &Omega;
 * -d) 3.91 x 103 &Omega;
 * -e) 4.74 x 103 &Omega;

7) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * +a) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * -b) None of these are true.
 * -c) It is not possible to connect that Number of Resistors in parallel.
 * -d) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity

8) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * -a) None of these are true
 * -b) 5 Joules
 * +c) 25 Joules
 * -d) 3 Joules

9) A battery has an emf of 6.5 volts, and an internal resistance of 244 $$k\Omega$$. It is connected to a 4 $$M\Omega$$ resistor.  What power is developed in the 4  $$M\Omega$$ resistor?


 * -a) 7.09 $$\mu$$W.
 * -b) 8.16 $$\mu$$W.
 * +c) 9.38 $$\mu$$W.
 * -d) 10.79 $$\mu$$W.
 * -e) 12.41 $$\mu$$W.

10) A 5.8 ohm resistor is connected in series to a pair of 2.8 ohm resistors that are in parallel.  What is the net resistance?


 * +a) 7.2 ohms.
 * -b) 8.3 ohms.
 * -c) 9.5 ohms.
 * -d) 11 ohms.
 * -e) 12.6 ohms.

Key: S1
1) A battery has an emf of 5.6 volts, and an internal resistance of 460 $$k\Omega$$. It is connected to a 2.4 $$M\Omega$$ resistor.  What power is developed in the 2.4  $$M\Omega$$ resistor?


 * -a) 6.05 $$\mu$$W.
 * -b) 6.96 $$\mu$$W.
 * -c) 8 $$\mu$$W.
 * +d) 9.2 $$\mu$$W.
 * -e) 10.58 $$\mu$$W.

2) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=87 C  and $$\tau=$$0.0154 s. What is the current at $$t=$$0.0211 s?


 * +a) 1.435E+03 A
 * -b) 1.579E+03 A
 * -c) 1.737E+03 A
 * -d) 1.910E+03 A
 * -e) 2.102E+03 A

3) A 196 Watt DC motor draws 0.35 amps of current. What is effective resistance?


 * +a) 1.6 x 103 &Omega;
 * -b) 1.94 x 103 &Omega;
 * -c) 2.35 x 103 &Omega;
 * -d) 2.85 x 103 &Omega;
 * -e) 3.45 x 103 &Omega;

4) Three resistors, R1 = 0.624 &Omega;, and R2 = R2 = 1.37 &Omega;, are connected in parallel to a 7.46 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 7.371E+01 W
 * -b) 8.108E+01 W
 * +c) 8.919E+01 W
 * -d) 9.810E+01 W
 * -e) 1.079E+02 W

5) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * -a) None of these are true
 * -b) 5 Joules
 * -c) 3 Joules
 * +d) 25 Joules

6) Imagine a substance could be made into a very hot filament. Suppose the resitance is 6.06 &Omega; at a temperature of 80&deg;C and that the temperature coefficient of expansion is 4.290E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 330 &deg;C?


 * -a) 1.196E+01 &Omega;
 * +b) 1.256E+01 &Omega;
 * -c) 1.319E+01 &Omega;
 * -d) 1.385E+01 &Omega;
 * -e) 1.454E+01 &Omega;

7) A 4 volt battery moves 19 Coulombs of charge in 1.3 hours. What is the power?


 * +a) 1.62 x 10-2 W
 * -b) 1.97 x 10-2 W
 * -c) 2.38 x 10-2 W
 * -d) 2.89 x 10-2 W
 * -e) 3.5 x 10-2 W

8) The resistances in the figure shown are R1= 2.34 &Omega;, R2= 1.34 &Omega;, and R2= 2.94 &Omega;. V1 and V3 are text 0.609 V and 1.68 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.541 V. What is the absolute value of the current through R1?


 * -a) 1.464E-01 A
 * +b) 1.610E-01 A
 * -c) 1.772E-01 A
 * -d) 1.949E-01 A
 * -e) 2.144E-01 A

9) A 6.4 ohm resistor is connected in series to a pair of 7.4 ohm resistors that are in parallel.  What is the net resistance?


 * +a) 10.1 ohms.
 * -b) 11.6 ohms.
 * -c) 13.4 ohms.
 * -d) 15.4 ohms.
 * -e) 17.7 ohms.

10) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * -a) It is not possible to connect that Number of Resistors in parallel.
 * -b) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity
 * -c) None of these are true.
 * +d) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.

Key: S2
1) A battery has an emf of 5.5 volts, and an internal resistance of 296 $$k\Omega$$. It is connected to a 3.3 $$M\Omega$$ resistor.  What power is developed in the 3.3  $$M\Omega$$ resistor?


 * +a) 7.72 $$\mu$$W.
 * -b) 8.88 $$\mu$$W.
 * -c) 10.21 $$\mu$$W.
 * -d) 11.74 $$\mu$$W.
 * -e) 13.5 $$\mu$$W.

2) The resistances in the figure shown are R1= 2.67 &Omega;, R2= 1.78 &Omega;, and R2= 3.63 &Omega;. V1 and V3 are text 0.448 V and 2.29 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.656 V. What is the absolute value of the current through R1?


 * -a) 9.287E-02 A
 * -b) 1.022E-01 A
 * -c) 1.124E-01 A
 * +d) 1.236E-01 A
 * -e) 1.360E-01 A

3) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * -a) 2.2 x 103 &Omega;
 * +b) 2.67 x 103 &Omega;
 * -c) 3.23 x 103 &Omega;
 * -d) 3.91 x 103 &Omega;
 * -e) 4.74 x 103 &Omega;

4) Three resistors, R1 = 1.43 &Omega;, and R2 = R2 = 3.25 &Omega;, are connected in parallel to a 9.03 V voltage source. Calculate the power dissipated by the smaller resistor (R1.)


 * -a) 5.184E+01 W
 * +b) 5.702E+01 W
 * -c) 6.272E+01 W
 * -d) 6.900E+01 W
 * -e) 7.590E+01 W

5) If you put an infinite number of resistors in parallel, what would the total resistance be?
 * -a) It is not possible to connect that Number of Resistors in parallel.
 * -b) None of these are true.
 * +c) $$R_{total}$$ would approach Zero as The No. of Resistors In parallel Approaches Infinity.
 * -d) $$R_{total}$$ would approach 1 as The No. of Resistors In parallel Approaches Infinity

6) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * -a) None of these are true
 * -b) 3 Joules
 * -c) 5 Joules
 * +d) 25 Joules

7) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=42 C  and $$\tau=$$0.0166 s. What is the current at $$t=$$0.0156 s?


 * +a) 9.886E+02 A
 * -b) 1.087E+03 A
 * -c) 1.196E+03 A
 * -d) 1.316E+03 A
 * -e) 1.447E+03 A

8) A 3.1 volt battery moves 52 Coulombs of charge in 1.7 hours. What is the power?


 * -a) 1.79 x 10-2 W
 * -b) 2.17 x 10-2 W
 * +c) 2.63 x 10-2 W
 * -d) 3.19 x 10-2 W
 * -e) 3.87 x 10-2 W

9) A 5.8 ohm resistor is connected in series to a pair of 2.8 ohm resistors that are in parallel.  What is the net resistance?


 * +a) 7.2 ohms.
 * -b) 8.3 ohms.
 * -c) 9.5 ohms.
 * -d) 11 ohms.
 * -e) 12.6 ohms.

10) Imagine a substance could be made into a very hot filament. Suppose the resitance is 5.88 &Omega; at a temperature of 87&deg;C and that the temperature coefficient of expansion is 5.290E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 547 &deg;C?


 * -a) 1.831E+01 &Omega;
 * -b) 1.923E+01 &Omega;
 * +c) 2.019E+01 &Omega;
 * -d) 2.120E+01 &Omega;
 * -e) 2.226E+01 &Omega;

Key: T0
1) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=23 C  and $$\tau=$$0.0204 s. What is the current at $$t=$$0.0106 s?


 * -a) 6.096E+02 A
 * +b) 6.706E+02 A
 * -c) 7.376E+02 A
 * -d) 8.114E+02 A
 * -e) 8.925E+02 A

2) What is consumer cost to operate one 77&minus;W incandescent bulb for 12 hours per day for 1 year (365 days) if the cost of electricity is $0.124 per kilowatt-hour?


 * -a) $3.142E+01
 * -b) $3.456E+01
 * -c) $3.802E+01
 * +d) $4.182E+01
 * -e) $4.600E+01

3) Two sources of emf &epsilon;1=30.6 V, and  &epsilon;2=12.0 V are oriented as shownin the circuit. The resistances are R1=3.46 k&Omega; and  R2=2.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.97 mA and I4=0.643 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 4.986E+00 V
 * -b) 5.484E+00 V
 * -c) 6.033E+00 V
 * -d) 6.636E+00 V
 * +e) 7.299E+00 V

4) A given battery has a 13 V emf and an internal resistance of 0.113 &Omega;. If it is connected to a 0.686 &Omega; resistor what is the power dissipated by that load?


 * -a) 1.501E+02 W
 * -b) 1.651E+02 W
 * +c) 1.816E+02 W
 * -d) 1.998E+02 W
 * -e) 2.197E+02 W

5) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.7 x 10-4m/s
 * -b) 3.27 x 10-4m/s
 * -c) 3.96 x 10-4m/s
 * -d) 4.79 x 10-4m/s
 * +e) 5.81 x 10-4m/s

6) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * -a) 5.42 x 102 &Omega;
 * -b) 6.57 x 102 &Omega;
 * -c) 7.95 x 102 &Omega;
 * +d) 9.64 x 102 &Omega;
 * -e) 1.17 x 103 &Omega;

7) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * -a) The other point could be Negative or positive.
 * +b) Voltage is a measure of Electric Potential difference between two electrical points.
 * -c) None these are correct
 * -d) It's an Electrical Cliche.

8) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * +a) $$\frac{10}{7}\Omega$$.
 * -b) $$\frac{10}{6}\Omega$$.
 * -c) $$\frac{6}{10}\Omega$$.
 * -d) $$\frac{7}{10}\Omega$$.

9) A 5.7 ohm resistor is connected in series to a pair of 3.8 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 5 ohms.
 * -b) 5.7 ohms.
 * -c) 6.6 ohms.
 * +d) 7.6 ohms.
 * -e) 8.7 ohms.

10) An ideal 4.2 V voltage source is connected to two resistors in parallel.  One is 1.6$$k\Omega$$, and the other is 2.1 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.75 mA.
 * -b) 0.86 mA.
 * -c) 0.99 mA.
 * +d) 1.14 mA.
 * -e) 1.31 mA.

Key: T1
1) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 8.3 ohms.
 * -b) 9.6 ohms.
 * +c) 11 ohms.
 * -d) 12.7 ohms.
 * -e) 14.5 ohms.

2) Two sources of emf &epsilon;1=30.6 V, and  &epsilon;2=12.0 V are oriented as shownin the circuit. The resistances are R1=3.46 k&Omega; and  R2=2.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.97 mA and I4=0.643 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 4.986E+00 V
 * -b) 5.484E+00 V
 * -c) 6.033E+00 V
 * -d) 6.636E+00 V
 * +e) 7.299E+00 V

3) A given battery has a 14 V emf and an internal resistance of 0.132 &Omega;. If it is connected to a 0.689 &Omega; resistor what is the power dissipated by that load?


 * -a) 1.656E+02 W
 * -b) 1.821E+02 W
 * +c) 2.003E+02 W
 * -d) 2.204E+02 W
 * -e) 2.424E+02 W

4) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{10}{6}\Omega$$.
 * +b) $$\frac{10}{7}\Omega$$.
 * -c) $$\frac{6}{10}\Omega$$.
 * -d) $$\frac{7}{10}\Omega$$.

5) What is consumer cost to operate one 76&minus;W incandescent bulb for 9 hours per day for 1 year (365 days) if the cost of electricity is $0.144 per kilowatt-hour?


 * +a) $3.595E+01
 * -b) $3.955E+01
 * -c) $4.350E+01
 * -d) $4.785E+01
 * -e) $5.264E+01

6) A 162 Watt DC motor draws 0.41 amps of current. What is effective resistance?


 * -a) 5.42 x 102 &Omega;
 * -b) 6.57 x 102 &Omega;
 * -c) 7.95 x 102 &Omega;
 * +d) 9.64 x 102 &Omega;
 * -e) 1.17 x 103 &Omega;

7) An ideal 5.6 V voltage source is connected to two resistors in parallel.  One is 2.3$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.56 mA.
 * -b) 0.64 mA.
 * -c) 0.74 mA.
 * +d) 0.85 mA.
 * -e) 0.98 mA.

8) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * -a) None these are correct
 * -b) It's an Electrical Cliche.
 * -c) The other point could be Negative or positive.
 * +d) Voltage is a measure of Electric Potential difference between two electrical points.

9) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.7 x 10-4m/s
 * -b) 3.27 x 10-4m/s
 * -c) 3.96 x 10-4m/s
 * -d) 4.79 x 10-4m/s
 * +e) 5.81 x 10-4m/s

10) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=23 C  and $$\tau=$$0.0204 s. What is the current at $$t=$$0.0106 s?


 * -a) 6.096E+02 A
 * +b) 6.706E+02 A
 * -c) 7.376E+02 A
 * -d) 8.114E+02 A
 * -e) 8.925E+02 A

Key: T2
1) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * +a) 1.47 mA.
 * -b) 1.69 mA.
 * -c) 1.94 mA.
 * -d) 2.23 mA.
 * -e) 2.57 mA.

2) The charge passing a plane intersecting a wire is $$Q_M=\left(1-e^{t/\tau}\right)$$, where $$Q_M$$=84 C  and $$\tau=$$0.0199 s. What is the current at $$t=$$0.0104 s?


 * -a) 2.275E+03 A
 * +b) 2.503E+03 A
 * -c) 2.753E+03 A
 * -d) 3.029E+03 A
 * -e) 3.331E+03 A

3) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 3.82 x 10-4m/s
 * -b) 4.63 x 10-4m/s
 * -c) 5.61 x 10-4m/s
 * -d) 6.8 x 10-4m/s
 * -e) 8.24 x 10-4m/s

4) A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{6}{10}\Omega$$.
 * +b) $$\frac{10}{7}\Omega$$.
 * -c) $$\frac{10}{6}\Omega$$.
 * -d) $$\frac{7}{10}\Omega$$.

5) A given battery has a 11 V emf and an internal resistance of 0.0998 &Omega;. If it is connected to a 0.417 &Omega; resistor what is the power dissipated by that load?


 * -a) 1.419E+02 W
 * -b) 1.561E+02 W
 * -c) 1.717E+02 W
 * +d) 1.889E+02 W
 * -e) 2.078E+02 W

6) A 6.6 ohm resistor is connected in series to a pair of 6.4 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.4 ohms.
 * -b) 7.4 ohms.
 * -c) 8.5 ohms.
 * +d) 9.8 ohms.
 * -e) 11.3 ohms.

7) Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?
 * -a) None these are correct
 * +b) Voltage is a measure of Electric Potential difference between two electrical points.
 * -c) It's an Electrical Cliche.
 * -d) The other point could be Negative or positive.

8) What is consumer cost to operate one 91&minus;W incandescent bulb for 10 hours per day for 1 year (365 days) if the cost of electricity is $0.131 per kilowatt-hour?


 * -a) $2.972E+01
 * -b) $3.269E+01
 * -c) $3.596E+01
 * -d) $3.956E+01
 * +e) $4.351E+01

9) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=11.5 V are oriented as shownin the circuit. The resistances are R1=2.13 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.11 mA and I4=0.746 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 4.275E+00 V
 * -b) 4.703E+00 V
 * +c) 5.173E+00 V
 * -d) 5.691E+00 V
 * -e) 6.260E+00 V

10) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * +a) 7.74 x 102 &Omega;
 * -b) 9.38 x 102 &Omega;
 * -c) 1.14 x 103 &Omega;
 * -d) 1.38 x 103 &Omega;
 * -e) 1.67 x 103 &Omega;

Key: U0
1) Calculate the drift speed of electrons in a copper wire with a diameter of 4.9 mm carrying a 6.43 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * -a) 2.109E-05 m/s
 * -b) 2.320E-05 m/s
 * +c) 2.552E-05 m/s
 * -d) 2.807E-05 m/s
 * -e) 3.088E-05 m/s

2) Calculate the electric field in a 12-gauge copper wire that is 48 m long and carries a current of 63 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 3.198E-04 V/m
 * -b) 3.517E-04 V/m
 * -c) 3.869E-04 V/m
 * -d) 4.256E-04 V/m
 * -e) 4.682E-04 V/m

3) The resistances in the figure shown are R1= 2.34 &Omega;, R2= 1.34 &Omega;, and R2= 2.94 &Omega;. V1 and V3 are text 0.609 V and 1.68 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.541 V. What is the absolute value of the current through R1?


 * -a) 1.464E-01 A
 * +b) 1.610E-01 A
 * -c) 1.772E-01 A
 * -d) 1.949E-01 A
 * -e) 2.144E-01 A

4) Two sources of emf &epsilon;1=38.8 V, and  &epsilon;2=14.9 V are oriented as shownin the circuit. The resistances are R1=5.83 k&Omega; and  R2=1.77 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.57 mA and I4=1.19 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 1.013E+01 V
 * -b) 1.115E+01 V
 * -c) 1.226E+01 V
 * +d) 1.349E+01 V
 * -e) 1.484E+01 V

5) A power supply delivers 187 watts of power to a 287 ohm resistor.  What was the applied voltage?


 * +a) 2.32 x 102 volts
 * -b) 2.81 x 102 volts
 * -c) 3.4 x 102 volts
 * -d) 4.12 x 102 volts
 * -e) 4.99 x 102 volts

6) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * +a) 7.74 x 102 &Omega;
 * -b) 9.38 x 102 &Omega;
 * -c) 1.14 x 103 &Omega;
 * -d) 1.38 x 103 &Omega;
 * -e) 1.67 x 103 &Omega;

7) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{7}{11}\Omega$$.
 * +b) $$\frac{21}{10}\Omega$$.
 * -c) $$\frac{11}{7}\Omega$$.
 * -d) $$\frac{10}{21}\Omega$$.

8) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * -a) 8W
 * -b) 3W
 * -c) 2.2W
 * +d) 24W

9) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 8.3 ohms.
 * -b) 9.6 ohms.
 * +c) 11 ohms.
 * -d) 12.7 ohms.
 * -e) 14.5 ohms.

10) An ideal 6 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 25$$m\Omega$$ is used.  What current does the ammeter actually read?


 * +a) 70.6 A.
 * -b) 81.2 A.
 * -c) 93.4 A.
 * -d) 107.4 A.
 * -e) 123.5 A.

Key: U1
1) The resistances in the figure shown are R1= 2.67 &Omega;, R2= 1.78 &Omega;, and R2= 3.63 &Omega;. V1 and V3 are text 0.448 V and 2.29 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.656 V. What is the absolute value of the current through R1?


 * -a) 9.287E-02 A
 * -b) 1.022E-01 A
 * -c) 1.124E-01 A
 * +d) 1.236E-01 A
 * -e) 1.360E-01 A

2) Calculate the drift speed of electrons in a copper wire with a diameter of 2.72 mm carrying a 16.2 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * +a) 2.087E-04 m/s
 * -b) 2.295E-04 m/s
 * -c) 2.525E-04 m/s
 * -d) 2.777E-04 m/s
 * -e) 3.055E-04 m/s

3) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.1 ohms.
 * -b) 7 ohms.
 * -c) 8.1 ohms.
 * -d) 9.3 ohms.
 * +e) 10.7 ohms.

4) An ideal 5.9 volt battery is connected to a 0.059 ohm resistor.  To measure the current an ammeter with a resistance of 24$$m\Omega$$ is used.  What current does the ammeter actually read?


 * +a) 71.1 A.
 * -b) 81.7 A.
 * -c) 94 A.
 * -d) 108.1 A.
 * -e) 124.3 A.

5) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{10}{21}\Omega$$.
 * -b) $$\frac{7}{11}\Omega$$.
 * +c) $$\frac{21}{10}\Omega$$.
 * -d) $$\frac{11}{7}\Omega$$.

6) Two sources of emf &epsilon;1=57.0 V, and  &epsilon;2=18.1 V are oriented as shownin the circuit. The resistances are R1=4.95 k&Omega; and  R2=2.09 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.23 mA and I4=1.04 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 1.921E+01 V
 * +b) 2.114E+01 V
 * -c) 2.325E+01 V
 * -d) 2.557E+01 V
 * -e) 2.813E+01 V

7) Calculate the electric field in a 12-gauge copper wire that is 23 m long and carries a current of 64 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 2.953E-04 V/m
 * +b) 3.248E-04 V/m
 * -c) 3.573E-04 V/m
 * -d) 3.930E-04 V/m
 * -e) 4.324E-04 V/m

8) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * -a) 2.2 x 103 &Omega;
 * +b) 2.67 x 103 &Omega;
 * -c) 3.23 x 103 &Omega;
 * -d) 3.91 x 103 &Omega;
 * -e) 4.74 x 103 &Omega;

9) A power supply delivers 110 watts of power to a 299 ohm resistor.  What was the applied voltage?


 * -a) 8.42 x 101 volts
 * -b) 1.02 x 102 volts
 * -c) 1.24 x 102 volts
 * -d) 1.5 x 102 volts
 * +e) 1.81 x 102 volts

10) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * -a) 3W
 * -b) 8W
 * +c) 24W
 * -d) 2.2W

Key: U2
1) A 6.4 ohm resistor is connected in series to a pair of 7.4 ohm resistors that are in parallel.  What is the net resistance?


 * +a) 10.1 ohms.
 * -b) 11.6 ohms.
 * -c) 13.4 ohms.
 * -d) 15.4 ohms.
 * -e) 17.7 ohms.

2) Calculate the drift speed of electrons in a copper wire with a diameter of 4.49 mm carrying a 11.6 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * -a) 4.120E-05 m/s
 * -b) 4.532E-05 m/s
 * -c) 4.985E-05 m/s
 * +d) 5.483E-05 m/s
 * -e) 6.032E-05 m/s

3) Calculate the electric field in a 12-gauge copper wire that is 99 m long and carries a current of 71 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 3.604E-04 V/m
 * -b) 3.964E-04 V/m
 * -c) 4.360E-04 V/m
 * -d) 4.796E-04 V/m
 * -e) 5.276E-04 V/m

4) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{10}{21}\Omega$$.
 * -b) $$\frac{7}{11}\Omega$$.
 * +c) $$\frac{21}{10}\Omega$$.
 * -d) $$\frac{11}{7}\Omega$$.

5) Two sources of emf &epsilon;1=26.8 V, and  &epsilon;2=10.1 V are oriented as shownin the circuit. The resistances are R1=2.2 k&Omega; and  R2=2.55 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.29 mA and I4=0.464 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 3.436E+00 V
 * -b) 3.779E+00 V
 * -c) 4.157E+00 V
 * -d) 4.573E+00 V
 * +e) 5.030E+00 V

6) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * -a) 2.2W
 * +b) 24W
 * -c) 3W
 * -d) 8W

7) The resistances in the figure shown are R1= 2.67 &Omega;, R2= 1.78 &Omega;, and R2= 3.63 &Omega;. V1 and V3 are text 0.448 V and 2.29 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.656 V. What is the absolute value of the current through R1?


 * -a) 9.287E-02 A
 * -b) 1.022E-01 A
 * -c) 1.124E-01 A
 * +d) 1.236E-01 A
 * -e) 1.360E-01 A

8) A power supply delivers 145 watts of power to a 132 ohm resistor.  What was the applied voltage?


 * -a) 6.42 x 101 volts
 * -b) 7.78 x 101 volts
 * -c) 9.43 x 101 volts
 * -d) 1.14 x 102 volts
 * +e) 1.38 x 102 volts

9) An ideal 5.9 volt battery is connected to a 0.059 ohm resistor.  To measure the current an ammeter with a resistance of 24$$m\Omega$$ is used.  What current does the ammeter actually read?


 * +a) 71.1 A.
 * -b) 81.7 A.
 * -c) 94 A.
 * -d) 108.1 A.
 * -e) 124.3 A.

10) A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?


 * -a) 2.28 x 103 &Omega;
 * +b) 2.76 x 103 &Omega;
 * -c) 3.34 x 103 &Omega;
 * -d) 4.05 x 103 &Omega;
 * -e) 4.91 x 103 &Omega;

Key: V0
1) Calculate the drift speed of electrons in a copper wire with a diameter of 5.47 mm carrying a 3.48 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * -a) 1.008E-05 m/s
 * +b) 1.108E-05 m/s
 * -c) 1.219E-05 m/s
 * -d) 1.341E-05 m/s
 * -e) 1.475E-05 m/s

2) A device requires consumes 73 W of power and requires 9.14 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * -a) 1.187E+06 A/m2
 * -b) 1.306E+06 A/m2
 * -c) 1.436E+06 A/m2
 * -d) 1.580E+06 A/m2
 * +e) 1.738E+06 A/m2

3) The resistances in the figure shown are R1= 1.81 &Omega;, R2= 1.18 &Omega;, and R2= 2.62 &Omega;. V1 and V3 are text 0.628 V and 2.54 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.748 V. What is the absolute value of the current through R1?


 * -a) 1.552E-01 A
 * -b) 1.707E-01 A
 * -c) 1.878E-01 A
 * -d) 2.065E-01 A
 * +e) 2.272E-01 A

4) Two sources of emf &epsilon;1=40.6 V, and  &epsilon;2=13.5 V are oriented as shownin the circuit. The resistances are R1=4.35 k&Omega; and  R2=2.44 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.73 mA and I4=0.78 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 1.332E+00 mA
 * -b) 1.465E+00 mA
 * -c) 1.612E+00 mA
 * -d) 1.773E+00 mA
 * +e) 1.950E+00 mA

5) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 2.77 x 10-5m/s
 * -b) 3.36 x 10-5m/s
 * -c) 4.06 x 10-5m/s
 * -d) 4.92 x 10-5m/s
 * -e) 5.97 x 10-5m/s

6) A 4 volt battery moves 19 Coulombs of charge in 1.3 hours. What is the power?


 * +a) 1.62 x 10-2 W
 * -b) 1.97 x 10-2 W
 * -c) 2.38 x 10-2 W
 * -d) 2.89 x 10-2 W
 * -e) 3.5 x 10-2 W

7) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * +a) I = 5A &  P = 25W.
 * -b) I = 5A &  P = 5W.
 * -c) I = 5A &  P = 3W.
 * -d) I = 5A &  P = 9W

8) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{11}{7}\Omega$$.
 * +b) $$\frac{21}{10}\Omega$$.
 * -c) $$\frac{7}{11}\Omega$$.
 * -d) $$\frac{10}{21}\Omega$$.

9) Two 9.4 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * -a) 5.4 ohms.
 * -b) 6.2 ohms.
 * +c) 7.1 ohms.
 * -d) 8.2 ohms.
 * -e) 9.4 ohms.

10) A 5.8 ohm resistor is connected in series to a pair of 2.8 ohm resistors that are in parallel.  What is the net resistance?


 * +a) 7.2 ohms.
 * -b) 8.3 ohms.
 * -c) 9.5 ohms.
 * -d) 11 ohms.
 * -e) 12.6 ohms.

Key: V1
1) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * +a) I = 5A &  P = 25W.
 * -b) I = 5A &  P = 5W.
 * -c) I = 5A &  P = 9W
 * -d) I = 5A &  P = 3W.

2) The resistances in the figure shown are R1= 1.81 &Omega;, R2= 1.18 &Omega;, and R2= 2.62 &Omega;. V1 and V3 are text 0.628 V and 2.54 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.748 V. What is the absolute value of the current through R1?


 * -a) 1.552E-01 A
 * -b) 1.707E-01 A
 * -c) 1.878E-01 A
 * -d) 2.065E-01 A
 * +e) 2.272E-01 A

3) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?


 * -a) 7.85 x 10-3 W
 * -b) 9.51 x 10-3 W
 * -c) 1.15 x 10-2 W
 * -d) 1.4 x 10-2 W
 * +e) 1.69 x 10-2 W

4) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{11}{7}\Omega$$.
 * -b) $$\frac{10}{21}\Omega$$.
 * +c) $$\frac{21}{10}\Omega$$.
 * -d) $$\frac{7}{11}\Omega$$.

5) A 5.9 ohm resistor is connected in series to a pair of 3 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 5.6 ohms.
 * -b) 6.4 ohms.
 * +c) 7.4 ohms.
 * -d) 8.5 ohms.
 * -e) 9.8 ohms.

6) Two 6.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.4 ohm resistor.  What is the net resistance?


 * -a) 3.1 ohms.
 * -b) 3.6 ohms.
 * -c) 4.2 ohms.
 * -d) 4.8 ohms.
 * +e) 5.5 ohms.

7) Calculate the drift speed of electrons in a copper wire with a diameter of 3.33 mm carrying a 13.8 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * -a) 8.910E-05 m/s
 * -b) 9.801E-05 m/s
 * -c) 1.078E-04 m/s
 * +d) 1.186E-04 m/s
 * -e) 1.305E-04 m/s

8) Two sources of emf &epsilon;1=40.3 V, and  &epsilon;2=16.8 V are oriented as shownin the circuit. The resistances are R1=2.57 k&Omega; and  R2=2.25 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.96 mA and I4=0.752 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 1.825E+00 mA
 * -b) 2.007E+00 mA
 * +c) 2.208E+00 mA
 * -d) 2.429E+00 mA
 * -e) 2.672E+00 mA

9) A device requires consumes 103 W of power and requires 6.3 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * -a) 8.999E+05 A/m2
 * -b) 9.899E+05 A/m2
 * -c) 1.089E+06 A/m2
 * +d) 1.198E+06 A/m2
 * -e) 1.317E+06 A/m2

10) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 2.77 x 10-5m/s
 * -b) 3.36 x 10-5m/s
 * -c) 4.06 x 10-5m/s
 * -d) 4.92 x 10-5m/s
 * -e) 5.97 x 10-5m/s

Key: V2
1) Two 8.2 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.8 ohm resistor.  What is the net resistance?


 * +a) 9.9 ohms.
 * -b) 11.4 ohms.
 * -c) 13.1 ohms.
 * -d) 15.1 ohms.
 * -e) 17.3 ohms.

2) A 7.5 ohm resistor is connected in series to a pair of 7 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 8.3 ohms.
 * -b) 9.6 ohms.
 * +c) 11 ohms.
 * -d) 12.7 ohms.
 * -e) 14.5 ohms.

3) Two sources of emf &epsilon;1=40.6 V, and  &epsilon;2=13.5 V are oriented as shownin the circuit. The resistances are R1=4.35 k&Omega; and  R2=2.44 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.73 mA and I4=0.78 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 1.332E+00 mA
 * -b) 1.465E+00 mA
 * -c) 1.612E+00 mA
 * -d) 1.773E+00 mA
 * +e) 1.950E+00 mA

4) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 2.77 x 10-5m/s
 * -b) 3.36 x 10-5m/s
 * -c) 4.06 x 10-5m/s
 * -d) 4.92 x 10-5m/s
 * -e) 5.97 x 10-5m/s

5) A device requires consumes 81 W of power and requires 2.34 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * -a) 3.342E+05 A/m2
 * -b) 3.677E+05 A/m2
 * -c) 4.044E+05 A/m2
 * +d) 4.449E+05 A/m2
 * -e) 4.894E+05 A/m2

6) A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?
 * -a) I = 5A &  P = 3W.
 * +b) I = 5A &  P = 25W.
 * -c) I = 5A &  P = 5W.
 * -d) I = 5A &  P = 9W

7) A 3.1 volt battery moves 52 Coulombs of charge in 1.7 hours. What is the power?


 * -a) 1.79 x 10-2 W
 * -b) 2.17 x 10-2 W
 * +c) 2.63 x 10-2 W
 * -d) 3.19 x 10-2 W
 * -e) 3.87 x 10-2 W

8) Calculate the drift speed of electrons in a copper wire with a diameter of 5.82 mm carrying a 9.11 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 103kg/m3 and the atomic mass of copper is 63.54 g/mol. Avagadro's number is 6.02 x 1023atoms/mol.


 * -a) 1.926E-05 m/s
 * -b) 2.118E-05 m/s
 * -c) 2.330E-05 m/s
 * +d) 2.563E-05 m/s
 * -e) 2.819E-05 m/s

9) The resistances in the figure shown are R1= 2.24 &Omega;, R2= 1.03 &Omega;, and R2= 2.39 &Omega;. V1 and V3 are text 0.595 V and 2.58 V, respectively. But V2 is opposite to that shown in the figure, or, equivalently, V2=&minus;0.707 V. What is the absolute value of the current through R1?


 * -a) 1.834E-01 A
 * +b) 2.018E-01 A
 * -c) 2.220E-01 A
 * -d) 2.441E-01 A
 * -e) 2.686E-01 A

10) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{11}{7}\Omega$$.
 * +b) $$\frac{21}{10}\Omega$$.
 * -c) $$\frac{10}{21}\Omega$$.
 * -d) $$\frac{7}{11}\Omega$$.

Key: W0
1) A DC winch moter draws 25 amps at 128 volts as it lifts a 5.710E+03 N weight at a constant speed of 0.449 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 8.413E-01 &Omega;
 * -b) 9.254E-01 &Omega;
 * +c) 1.018E+00 &Omega;
 * -d) 1.120E+00 &Omega;
 * -e) 1.232E+00 &Omega;

2) Calculate the electric field in a 12-gauge copper wire that is 16 m long and carries a current of 58 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 2.212E-04 V/m
 * -b) 2.433E-04 V/m
 * -c) 2.676E-04 V/m
 * +d) 2.944E-04 V/m
 * -e) 3.238E-04 V/m

3) Two sources of emf &epsilon;1=46.1 V, and  &epsilon;2=16.2 V are oriented as shownin the circuit. The resistances are R1=5.17 k&Omega; and  R2=2.06 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.97 mA and I4=1.07 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * -a) 1.309E+01 V
 * -b) 1.440E+01 V
 * +c) 1.584E+01 V
 * -d) 1.742E+01 V
 * -e) 1.917E+01 V

4) In the circuit shown V=18.8 V, R1=2.59 &Omega;, R2=5.47 &Omega;, and R3=15.8 &Omega;. What is the power dissipated by R2?


 * -a) 2.191E+01 W
 * +b) 2.410E+01 W
 * -c) 2.651E+01 W
 * -d) 2.916E+01 W
 * -e) 3.208E+01 W

5) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 2.7 x 10-4m/s
 * -b) 3.27 x 10-4m/s
 * -c) 3.96 x 10-4m/s
 * -d) 4.79 x 10-4m/s
 * +e) 5.81 x 10-4m/s

6) A 3.1 volt battery moves 40 Coulombs of charge in 0.9 hours. What is the power?


 * -a) 2.61 x 10-2 W
 * -b) 3.16 x 10-2 W
 * +c) 3.83 x 10-2 W
 * -d) 4.64 x 10-2 W
 * -e) 5.62 x 10-2 W

7) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * -a) 11.67 Joules
 * -b) 2.5 Watts
 * -c) None of these are ture.
 * +d) 1.67 Watts

8) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * -a) 2.2W
 * +b) 24W
 * -c) 3W
 * -d) 8W

9) An ideal 7.5 volt battery is connected to a 0.06 ohm resistor.  To measure the current an ammeter with a resistance of 19$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 54.3 A.
 * -b) 62.4 A.
 * -c) 71.8 A.
 * -d) 82.6 A.
 * +e) 94.9 A.

10) A battery has an emf of 5.5 volts, and an internal resistance of 296 $$k\Omega$$. It is connected to a 3.3 $$M\Omega$$ resistor.  What power is developed in the 3.3  $$M\Omega$$ resistor?


 * +a) 7.72 $$\mu$$W.
 * -b) 8.88 $$\mu$$W.
 * -c) 10.21 $$\mu$$W.
 * -d) 11.74 $$\mu$$W.
 * -e) 13.5 $$\mu$$W.

Key: W1
1) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * -a) 4.14 x 10-2 W
 * +b) 5.02 x 10-2 W
 * -c) 6.08 x 10-2 W
 * -d) 7.37 x 10-2 W
 * -e) 8.93 x 10-2 W

2) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 3.07 x 10-5m/s
 * -b) 3.72 x 10-5m/s
 * -c) 4.5 x 10-5m/s
 * -d) 5.46 x 10-5m/s
 * +e) 6.61 x 10-5m/s

3) An ideal 7.5 volt battery is connected to a 0.084 ohm resistor.  To measure the current an ammeter with a resistance of 14$$m\Omega$$ is used.  What current does the ammeter actually read?


 * -a) 43.8 A.
 * -b) 50.3 A.
 * -c) 57.9 A.
 * -d) 66.5 A.
 * +e) 76.5 A.

4) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * +a) 1.67 Watts
 * -b) 11.67 Joules
 * -c) 2.5 Watts
 * -d) None of these are ture.

5) Two sources of emf &epsilon;1=40.9 V, and  &epsilon;2=16.1 V are oriented as shownin the circuit. The resistances are R1=5.55 k&Omega; and  R2=1.55 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=6.11 mA and I4=1.06 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * -a) 8.754E+00 V
 * -b) 9.630E+00 V
 * -c) 1.059E+01 V
 * -d) 1.165E+01 V
 * +e) 1.282E+01 V

6) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * -a) 3W
 * +b) 24W
 * -c) 2.2W
 * -d) 8W

7) Calculate the electric field in a 12-gauge copper wire that is 41 m long and carries a current of 71 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 3.604E-04 V/m
 * -b) 3.964E-04 V/m
 * -c) 4.360E-04 V/m
 * -d) 4.796E-04 V/m
 * -e) 5.276E-04 V/m

8) A DC winch moter draws 25 amps at 128 volts as it lifts a 5.710E+03 N weight at a constant speed of 0.449 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 8.413E-01 &Omega;
 * -b) 9.254E-01 &Omega;
 * +c) 1.018E+00 &Omega;
 * -d) 1.120E+00 &Omega;
 * -e) 1.232E+00 &Omega;

9) In the circuit shown V=17.9 V, R1=1.68 &Omega;, R2=7.84 &Omega;, and R3=12.3 &Omega;. What is the power dissipated by R2?


 * +a) 2.240E+01 W
 * -b) 2.464E+01 W
 * -c) 2.710E+01 W
 * -d) 2.981E+01 W
 * -e) 3.279E+01 W

10) A battery has an emf of 5.3 volts, and an internal resistance of 428 $$k\Omega$$. It is connected to a 2.3 $$M\Omega$$ resistor.  What power is developed in the 2.3  $$M\Omega$$ resistor?


 * -a) 4.96 $$\mu$$W.
 * -b) 5.71 $$\mu$$W.
 * -c) 6.56 $$\mu$$W.
 * -d) 7.55 $$\mu$$W.
 * +e) 8.68 $$\mu$$W.

Key: W2
1) A DC winch moter draws 23 amps at 170 volts as it lifts a 5.200E+03 N weight at a constant speed of 0.662 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 7.305E-01 &Omega;
 * -b) 8.036E-01 &Omega;
 * +c) 8.839E-01 &Omega;
 * -d) 9.723E-01 &Omega;
 * -e) 1.070E+00 &Omega;

2) A battery has an emf of 5.6 volts, and an internal resistance of 450 $$k\Omega$$. It is connected to a 2.7 $$M\Omega$$ resistor.  What power is developed in the 2.7  $$M\Omega$$ resistor?


 * -a) 4.88 $$\mu$$W.
 * -b) 5.61 $$\mu$$W.
 * -c) 6.45 $$\mu$$W.
 * -d) 7.42 $$\mu$$W.
 * +e) 8.53 $$\mu$$W.

3) In the circuit shown V=13.5 V, R1=2.66 &Omega;, R2=7.29 &Omega;, and R3=14.5 &Omega;. What is the power dissipated by R2?


 * -a) 7.123E+00 W
 * -b) 7.835E+00 W
 * -c) 8.618E+00 W
 * -d) 9.480E+00 W
 * +e) 1.043E+01 W

4) A 5.8 volt battery moves 95 Coulombs of charge in 0.3 hours. What is the power?


 * -a) 4.21 x 10-1 W
 * +b) 5.1 x 10-1 W
 * -c) 6.18 x 10-1 W
 * -d) 7.49 x 10-1 W
 * -e) 9.07 x 10-1 W

5) An ideal 5.9 volt battery is connected to a 0.059 ohm resistor.  To measure the current an ammeter with a resistance of 24$$m\Omega$$ is used.  What current does the ammeter actually read?


 * +a) 71.1 A.
 * -b) 81.7 A.
 * -c) 94 A.
 * -d) 108.1 A.
 * -e) 124.3 A.

6) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?
 * -a) 3W
 * -b) 8W
 * +c) 24W
 * -d) 2.2W

7) Two sources of emf &epsilon;1=67.2 V, and  &epsilon;2=18.7 V are oriented as shownin the circuit. The resistances are R1=3.45 k&Omega; and  R2=1.2 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=9.49 mA and I4=1.81 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R2?


 * -a) 1.906E+01 V
 * +b) 2.097E+01 V
 * -c) 2.306E+01 V
 * -d) 2.537E+01 V
 * -e) 2.790E+01 V

8) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 3.82 x 10-4m/s
 * -b) 4.63 x 10-4m/s
 * -c) 5.61 x 10-4m/s
 * -d) 6.8 x 10-4m/s
 * -e) 8.24 x 10-4m/s

9) Calculate the electric field in a 12-gauge copper wire that is 18 m long and carries a current of 22 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * +a) 1.117E-04 V/m
 * -b) 1.228E-04 V/m
 * -c) 1.351E-04 V/m
 * -d) 1.486E-04 V/m
 * -e) 1.635E-04 V/m

10) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * +a) 1.67 Watts
 * -b) 11.67 Joules
 * -c) 2.5 Watts
 * -d) None of these are ture.

Key: X0
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 4.48 &Omega; at a temperature of 56&deg;C and that the temperature coefficient of expansion is 4.550E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 449 &deg;C?


 * -a) 1.028E+01 &Omega;
 * -b) 1.079E+01 &Omega;
 * -c) 1.133E+01 &Omega;
 * -d) 1.190E+01 &Omega;
 * +e) 1.249E+01 &Omega;

2) Calculate the resistance of a 12-gauge copper wire that is 10 m long and carries a current of 41 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 3.467E-02 &Omega;
 * -b) 3.813E-02 &Omega;
 * -c) 4.195E-02 &Omega;
 * -d) 4.614E-02 &Omega;
 * +e) 5.076E-02 &Omega;

3) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 554 V.  If the combined external and internal resistance is 228 &Omega and the capacitance is  93 mF, how long will it take for the capacitor's voltage to reach 450.0 V?


 * -a) 3.224E+01 s
 * +b) 3.547E+01 s
 * -c) 3.902E+01 s
 * -d) 4.292E+01 s
 * -e) 4.721E+01 s

4) A given battery has a 14 V emf and an internal resistance of 0.192 &Omega;. If it is connected to a 0.766 &Omega; resistor what is the power dissipated by that load?


 * -a) 1.229E+02 W
 * -b) 1.352E+02 W
 * -c) 1.487E+02 W
 * +d) 1.636E+02 W
 * -e) 1.799E+02 W

5) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 6.77 x 10-5m/s
 * -b) 8.2 x 10-5m/s
 * -c) 9.93 x 10-5m/s
 * +d) 1.2 x 10-4m/s
 * -e) 1.46 x 10-4m/s

6) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * -a) 2.2 x 103 &Omega;
 * +b) 2.67 x 103 &Omega;
 * -c) 3.23 x 103 &Omega;
 * -d) 3.91 x 103 &Omega;
 * -e) 4.74 x 103 &Omega;

7) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) $$4.5\Omega.$$
 * +b) $$2.5\Omega.$$
 * -c) None of these are true.
 * -d) $$3.5\Omega.$$

8) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * +a) 1.67 Watts
 * -b) 2.5 Watts
 * -c) 11.67 Joules
 * -d) None of these are ture.

9) Two 7.8 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.4 ohm resistor.  What is the net resistance?


 * +a) 9.3 ohms.
 * -b) 10.7 ohms.
 * -c) 12.3 ohms.
 * -d) 14.1 ohms.
 * -e) 16.3 ohms.

10) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * +a) 1.47 mA.
 * -b) 1.69 mA.
 * -c) 1.94 mA.
 * -d) 2.23 mA.
 * -e) 2.57 mA.

Key: X1
1) Two 7.8 ohm resistors are connected in parallel.  This combination is then connected in series to a 5.4 ohm resistor.  What is the net resistance?


 * +a) 9.3 ohms.
 * -b) 10.7 ohms.
 * -c) 12.3 ohms.
 * -d) 14.1 ohms.
 * -e) 16.3 ohms.

2) An ideal 3.1 V voltage source is connected to two resistors in parallel.  One is 1.5$$k\Omega$$, and the other is 2.2 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.55 mA.
 * -b) 0.63 mA.
 * -c) 0.73 mA.
 * +d) 0.84 mA.
 * -e) 0.96 mA.

3) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) $$3.5\Omega.$$
 * -b) None of these are true.
 * -c) $$4.5\Omega.$$
 * +d) $$2.5\Omega.$$

4) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * -a) 2.5 Watts
 * -b) None of these are ture.
 * -c) 11.67 Joules
 * +d) 1.67 Watts

5) A 196 Watt DC motor draws 0.35 amps of current. What is effective resistance?


 * +a) 1.6 x 103 &Omega;
 * -b) 1.94 x 103 &Omega;
 * -c) 2.35 x 103 &Omega;
 * -d) 2.85 x 103 &Omega;
 * -e) 3.45 x 103 &Omega;

6) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 3.82 x 10-4m/s
 * -b) 4.63 x 10-4m/s
 * -c) 5.61 x 10-4m/s
 * -d) 6.8 x 10-4m/s
 * -e) 8.24 x 10-4m/s

7) Calculate the resistance of a 12-gauge copper wire that is 13 m long and carries a current of 22 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 4.957E-02 &Omega;
 * -b) 5.453E-02 &Omega;
 * -c) 5.998E-02 &Omega;
 * +d) 6.598E-02 &Omega;
 * -e) 7.258E-02 &Omega;

8) A given battery has a 12 V emf and an internal resistance of 0.0984 &Omega;. If it is connected to a 0.485 &Omega; resistor what is the power dissipated by that load?


 * +a) 2.052E+02 W
 * -b) 2.257E+02 W
 * -c) 2.483E+02 W
 * -d) 2.731E+02 W
 * -e) 3.004E+02 W

9) Imagine a substance could be made into a very hot filament. Suppose the resitance is 1.56 &Omega; at a temperature of 97&deg;C and that the temperature coefficient of expansion is 5.020E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 340 &deg;C?


 * +a) 3.463E+00 &Omega;
 * -b) 3.636E+00 &Omega;
 * -c) 3.818E+00 &Omega;
 * -d) 4.009E+00 &Omega;
 * -e) 4.209E+00 &Omega;

10) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 505 V.  If the combined external and internal resistance is 189 &Omega and the capacitance is  74 mF, how long will it take for the capacitor's voltage to reach 374.0 V?


 * -a) 1.560E+01 s
 * -b) 1.716E+01 s
 * +c) 1.887E+01 s
 * -d) 2.076E+01 s
 * -e) 2.284E+01 s

Key: X2
1) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 2.77 x 10-5m/s
 * -b) 3.36 x 10-5m/s
 * -c) 4.06 x 10-5m/s
 * -d) 4.92 x 10-5m/s
 * -e) 5.97 x 10-5m/s

2) In the circuit shown the voltage across the capaciator is zero at time t=0 when a switch is closed putting the capacitor into contact with a power supply of 505 V.  If the combined external and internal resistance is 189 &Omega and the capacitance is  74 mF, how long will it take for the capacitor's voltage to reach 374.0 V?


 * -a) 1.560E+01 s
 * -b) 1.716E+01 s
 * +c) 1.887E+01 s
 * -d) 2.076E+01 s
 * -e) 2.284E+01 s

3) An ideal 3.1 V voltage source is connected to two resistors in parallel.  One is 1.5$$k\Omega$$, and the other is 2.2 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.55 mA.
 * -b) 0.63 mA.
 * -c) 0.73 mA.
 * +d) 0.84 mA.
 * -e) 0.96 mA.

4) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?
 * +a) 1.67 Watts
 * -b) 11.67 Joules
 * -c) None of these are ture.
 * -d) 2.5 Watts

5) Calculate the resistance of a 12-gauge copper wire that is 11 m long and carries a current of 94 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 3.813E-02 &Omega;
 * -b) 4.195E-02 &Omega;
 * -c) 4.614E-02 &Omega;
 * -d) 5.076E-02 &Omega;
 * +e) 5.583E-02 &Omega;

6) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
 * -a) None of these are true.
 * +b) $$2.5\Omega.$$
 * -c) $$4.5\Omega.$$
 * -d) $$3.5\Omega.$$

7) Imagine a substance could be made into a very hot filament. Suppose the resitance is 2.89 &Omega; at a temperature of 89&deg;C and that the temperature coefficient of expansion is 5.340E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 566 &deg;C?


 * -a) 9.763E+00 &Omega;
 * +b) 1.025E+01 &Omega;
 * -c) 1.076E+01 &Omega;
 * -d) 1.130E+01 &Omega;
 * -e) 1.187E+01 &Omega;

8) A 171 Watt DC motor draws 0.47 amps of current. What is effective resistance?


 * +a) 7.74 x 102 &Omega;
 * -b) 9.38 x 102 &Omega;
 * -c) 1.14 x 103 &Omega;
 * -d) 1.38 x 103 &Omega;
 * -e) 1.67 x 103 &Omega;

9) Two 7 ohm resistors are connected in parallel.  This combination is then connected in series to a 2.8 ohm resistor.  What is the net resistance?


 * -a) 5.5 ohms.
 * +b) 6.3 ohms.
 * -c) 7.2 ohms.
 * -d) 8.3 ohms.
 * -e) 9.6 ohms.

10) A given battery has a 15 V emf and an internal resistance of 0.0536 &Omega;. If it is connected to a 0.64 &Omega; resistor what is the power dissipated by that load?


 * -a) 2.721E+02 W
 * +b) 2.993E+02 W
 * -c) 3.293E+02 W
 * -d) 3.622E+02 W
 * -e) 3.984E+02 W

Key: Y0
1) A DC winch moter draws 25 amps at 128 volts as it lifts a 5.710E+03 N weight at a constant speed of 0.449 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * -a) 8.413E-01 &Omega;
 * -b) 9.254E-01 &Omega;
 * +c) 1.018E+00 &Omega;
 * -d) 1.120E+00 &Omega;
 * -e) 1.232E+00 &Omega;

2) Calculate the resistance of a 12-gauge copper wire that is 45 m long and carries a current of 51 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 1.716E-01 &Omega;
 * -b) 1.888E-01 &Omega;
 * -c) 2.076E-01 &Omega;
 * +d) 2.284E-01 &Omega;
 * -e) 2.512E-01 &Omega;

3) Two sources of emf &epsilon;1=40.3 V, and  &epsilon;2=16.8 V are oriented as shownin the circuit. The resistances are R1=2.57 k&Omega; and  R2=2.25 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.96 mA and I4=0.752 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 1.825E+00 mA
 * -b) 2.007E+00 mA
 * +c) 2.208E+00 mA
 * -d) 2.429E+00 mA
 * -e) 2.672E+00 mA

4) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=8.29 V are oriented as shownin the circuit. The resistances are R1=3.43 k&Omega; and  R2=1.16 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.09 mA and I4=1.06 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 6.720E+00 V
 * -b) 7.392E+00 V
 * -c) 8.131E+00 V
 * -d) 8.944E+00 V
 * +e) 9.838E+00 V

5) The diameter of a copper wire is 8.7 mm, and it carries a current of 22 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 2.77 x 10-5m/s
 * -b) 3.36 x 10-5m/s
 * -c) 4.06 x 10-5m/s
 * -d) 4.92 x 10-5m/s
 * -e) 5.97 x 10-5m/s

6) A 4 volt battery moves 19 Coulombs of charge in 1.3 hours. What is the power?


 * +a) 1.62 x 10-2 W
 * -b) 1.97 x 10-2 W
 * -c) 2.38 x 10-2 W
 * -d) 2.89 x 10-2 W
 * -e) 3.5 x 10-2 W

7) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * +a) $$R_1 = 125V$$ and $$R_2 = 125V$$.
 * -b) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * -c) None of these are true.
 * -d) $$R_1 = 250V$$ and $$R_2 = 0V$$.

8) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{11}{7}\Omega$$.
 * -b) $$\frac{10}{21}\Omega$$.
 * +c) $$\frac{21}{10}\Omega$$.
 * -d) $$\frac{7}{11}\Omega$$.

9) An ideal 8.8 V voltage source is connected to two resistors in parallel.  One is 0.8$$k\Omega$$, and the other is 2.9 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 1.56 mA.
 * -b) 1.8 mA.
 * -c) 2.07 mA.
 * +d) 2.38 mA.
 * -e) 2.74 mA.

10) A 8 ohm resistor is connected in series to a pair of 5.6 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 7.1 ohms.
 * -b) 8.2 ohms.
 * -c) 9.4 ohms.
 * +d) 10.8 ohms.
 * -e) 12.4 ohms.

Key: Y1
1) Two sources of emf &epsilon;1=52.7 V, and  &epsilon;2=17.5 V are oriented as shownin the circuit. The resistances are R1=5.86 k&Omega; and  R2=2.08 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.48 mA and I4=0.988 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * +a) 2.064E+01 V
 * -b) 2.270E+01 V
 * -c) 2.497E+01 V
 * -d) 2.747E+01 V
 * -e) 3.021E+01 V

2) A 8.1 ohm resistor is connected in series to a pair of 5.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 6.1 ohms.
 * -b) 7 ohms.
 * -c) 8.1 ohms.
 * -d) 9.3 ohms.
 * +e) 10.7 ohms.

3) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{7}{11}\Omega$$.
 * -b) $$\frac{11}{7}\Omega$$.
 * -c) $$\frac{10}{21}\Omega$$.
 * +d) $$\frac{21}{10}\Omega$$.

4) A DC winch moter draws 19 amps at 175 volts as it lifts a 4.230E+03 N weight at a constant speed of 0.483 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * +a) 3.551E+00 &Omega;
 * -b) 3.906E+00 &Omega;
 * -c) 4.297E+00 &Omega;
 * -d) 4.726E+00 &Omega;
 * -e) 5.199E+00 &Omega;

5) An ideal 9.2 V voltage source is connected to two resistors in parallel.  One is 1.1$$k\Omega$$, and the other is 2.4 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 2.29 mA.
 * +b) 2.63 mA.
 * -c) 3.02 mA.
 * -d) 3.48 mA.
 * -e) 4 mA.

6) Two sources of emf &epsilon;1=29.3 V, and  &epsilon;2=11.0 V are oriented as shownin the circuit. The resistances are R1=5.65 k&Omega; and  R2=2.68 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=2.81 mA and I4=0.525 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 1.717E+00 mA
 * -b) 1.888E+00 mA
 * -c) 2.077E+00 mA
 * +d) 2.285E+00 mA
 * -e) 2.514E+00 mA

7) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * -a) $$R_1 = 250V$$ and $$R_2 = 0V$$.
 * -b) None of these are true.
 * -c) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * +d) $$R_1 = 125V$$ and $$R_2 = 125V$$.

8) A 4.7 volt battery moves 50 Coulombs of charge in 1.3 hours. What is the power?


 * -a) 4.14 x 10-2 W
 * +b) 5.02 x 10-2 W
 * -c) 6.08 x 10-2 W
 * -d) 7.37 x 10-2 W
 * -e) 8.93 x 10-2 W

9) Calculate the resistance of a 12-gauge copper wire that is 13 m long and carries a current of 22 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 4.957E-02 &Omega;
 * -b) 5.453E-02 &Omega;
 * -c) 5.998E-02 &Omega;
 * +d) 6.598E-02 &Omega;
 * -e) 7.258E-02 &Omega;

10) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 6.77 x 10-5m/s
 * -b) 8.2 x 10-5m/s
 * -c) 9.93 x 10-5m/s
 * +d) 1.2 x 10-4m/s
 * -e) 1.46 x 10-4m/s

Key: Y2
1) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=11.5 V are oriented as shownin the circuit. The resistances are R1=2.13 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.11 mA and I4=0.746 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 4.275E+00 V
 * -b) 4.703E+00 V
 * +c) 5.173E+00 V
 * -d) 5.691E+00 V
 * -e) 6.260E+00 V

2) An ideal 9.4 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.3 $$k\Omega$$.  What is the current through the larger resistor?


 * +a) 1.47 mA.
 * -b) 1.69 mA.
 * -c) 1.94 mA.
 * -d) 2.23 mA.
 * -e) 2.57 mA.

3) A DC winch moter draws 26 amps at 153 volts as it lifts a 4.100E+03 N weight at a constant speed of 0.609 m/s. Assuming that all the electrical power is either converted into gravitational potential energy or ohmically heats the motor's coils, calculate the coil's resistance.


 * +a) 2.191E+00 &Omega;
 * -b) 2.410E+00 &Omega;
 * -c) 2.651E+00 &Omega;
 * -d) 2.916E+00 &Omega;
 * -e) 3.208E+00 &Omega;

4) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?


 * +a) 4.43 x 10-2 W
 * -b) 5.37 x 10-2 W
 * -c) 6.51 x 10-2 W
 * -d) 7.88 x 10-2 W
 * -e) 9.55 x 10-2 W

5) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * +a) 3.82 x 10-4m/s
 * -b) 4.63 x 10-4m/s
 * -c) 5.61 x 10-4m/s
 * -d) 6.8 x 10-4m/s
 * -e) 8.24 x 10-4m/s

6) Calculate the resistance of a 12-gauge copper wire that is 15 m long and carries a current of 27 mA. The resistivity of copper is 1.680E-08 &Omega;&middot;m and 12-gauge wire as a cross-sectional area of 3.31 mm2.


 * -a) 5.200E-02 &Omega;
 * -b) 5.720E-02 &Omega;
 * -c) 6.292E-02 &Omega;
 * -d) 6.921E-02 &Omega;
 * +e) 7.613E-02 &Omega;

7) A 5.6 ohm resistor is connected in series to a pair of 7.2 ohm resistors that are in parallel.  What is the net resistance?


 * -a) 7 ohms.
 * -b) 8 ohms.
 * +c) 9.2 ohms.
 * -d) 10.6 ohms.
 * -e) 12.2 ohms.

8) Two sources of emf &epsilon;1=36.3 V, and  &epsilon;2=12.9 V are oriented as shownin the circuit. The resistances are R1=4.28 k&Omega; and  R2=1.58 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.16 mA and I4=1.2 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of I5?


 * -a) 2.224E+00 mA
 * -b) 2.446E+00 mA
 * -c) 2.691E+00 mA
 * +d) 2.960E+00 mA
 * -e) 3.256E+00 mA

9) A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
 * -a) $$\frac{7}{11}\Omega$$.
 * -b) $$\frac{10}{21}\Omega$$.
 * -c) $$\frac{11}{7}\Omega$$.
 * +d) $$\frac{21}{10}\Omega$$.

10) Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?
 * -a) None of these are true.
 * -b) $$R_1 = 150V$$ and $$R_2 = 100V$$.
 * -c) $$R_1 = 250V$$ and $$R_2 = 0V$$.
 * +d) $$R_1 = 125V$$ and $$R_2 = 125V$$.

Key: Z0
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 5.73 &Omega; at a temperature of 99&deg;C and that the temperature coefficient of expansion is 5.260E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 420 &deg;C?


 * -a) 1.267E+01 &Omega;
 * -b) 1.331E+01 &Omega;
 * -c) 1.397E+01 &Omega;
 * -d) 1.467E+01 &Omega;
 * +e) 1.540E+01 &Omega;

2) A device requires consumes 88 W of power and requires 11.3 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * -a) 1.467E+06 A/m2
 * -b) 1.614E+06 A/m2
 * -c) 1.775E+06 A/m2
 * -d) 1.953E+06 A/m2
 * +e) 2.148E+06 A/m2

3) In the circuit shown V=15.8 V, R1=1.86 &Omega;, R2=7.66 &Omega;, and R3=12.9 &Omega;. What is the power dissipated by R2?


 * -a) 1.157E+01 W
 * -b) 1.273E+01 W
 * -c) 1.400E+01 W
 * -d) 1.540E+01 W
 * +e) 1.694E+01 W

4) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=8.29 V are oriented as shownin the circuit. The resistances are R1=3.43 k&Omega; and  R2=1.16 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=4.09 mA and I4=1.06 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 6.720E+00 V
 * -b) 7.392E+00 V
 * -c) 8.131E+00 V
 * -d) 8.944E+00 V
 * +e) 9.838E+00 V

5) A 130 Watt DC motor draws 0.3 amps of current. What is effective resistance?


 * -a) 8.12 x 102 &Omega;
 * -b) 9.84 x 102 &Omega;
 * -c) 1.19 x 103 &Omega;
 * +d) 1.44 x 103 &Omega;
 * -e) 1.75 x 103 &Omega;

6) The diameter of a copper wire is 8.3 mm, and it carries a current of 87 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 6.77 x 10-5m/s
 * -b) 8.2 x 10-5m/s
 * -c) 9.93 x 10-5m/s
 * +d) 1.2 x 10-4m/s
 * -e) 1.46 x 10-4m/s

7) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * +a) 25 Joules
 * -b) 3 Joules
 * -c) None of these are true
 * -d) 5 Joules

8) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * +a) $$R_{Total} = 6\Omega$$.
 * -b) None of these are true.
 * -c) $$R_{Total} = 3\Omega$$.
 * -d) $$R_{Total} = 0.5454\Omega$$.

9) A battery has an emf of 7 volts, and an internal resistance of 357 $$k\Omega$$. It is connected to a 2.9 $$M\Omega$$ resistor.  What power is developed in the 2.9  $$M\Omega$$ resistor?


 * +a) 13.4 $$\mu$$W.
 * -b) 15.4 $$\mu$$W.
 * -c) 17.72 $$\mu$$W.
 * -d) 20.37 $$\mu$$W.
 * -e) 23.43 $$\mu$$W.

10) An ideal 9.9 V voltage source is connected to two resistors in parallel.  One is 0.9$$k\Omega$$, and the other is 1.8 $$k\Omega$$.  What is the current through the larger resistor?


 * +a) 3.67 mA.
 * -b) 4.22 mA.
 * -c) 4.85 mA.
 * -d) 5.58 mA.
 * -e) 6.41 mA.

Key: Z1
1) Imagine a substance could be made into a very hot filament. Suppose the resitance is 3.64 &Omega; at a temperature of 82&deg;C and that the temperature coefficient of expansion is 4.530E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 390 &deg;C?


 * -a) 7.532E+00 &Omega;
 * -b) 7.908E+00 &Omega;
 * -c) 8.303E+00 &Omega;
 * +d) 8.719E+00 &Omega;
 * -e) 9.155E+00 &Omega;

2) A 130 Watt DC motor draws 0.3 amps of current. What is effective resistance?


 * -a) 8.12 x 102 &Omega;
 * -b) 9.84 x 102 &Omega;
 * -c) 1.19 x 103 &Omega;
 * +d) 1.44 x 103 &Omega;
 * -e) 1.75 x 103 &Omega;

3) An ideal 8.9 V voltage source is connected to two resistors in parallel.  One is 2.1$$k\Omega$$, and the other is 4.4 $$k\Omega$$.  What is the current through the larger resistor?


 * +a) 1.37 mA.
 * -b) 1.57 mA.
 * -c) 1.81 mA.
 * -d) 2.08 mA.
 * -e) 2.39 mA.

4) A battery has an emf of 5.6 volts, and an internal resistance of 450 $$k\Omega$$. It is connected to a 2.7 $$M\Omega$$ resistor.  What power is developed in the 2.7  $$M\Omega$$ resistor?


 * -a) 4.88 $$\mu$$W.
 * -b) 5.61 $$\mu$$W.
 * -c) 6.45 $$\mu$$W.
 * -d) 7.42 $$\mu$$W.
 * +e) 8.53 $$\mu$$W.

5) Two sources of emf &epsilon;1=16.8 V, and  &epsilon;2=7.15 V are oriented as shownin the circuit. The resistances are R1=3.12 k&Omega; and  R2=1.51 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=1.95 mA and I4=0.603 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 4.108E+00 V
 * +b) 4.519E+00 V
 * -c) 4.970E+00 V
 * -d) 5.468E+00 V
 * -e) 6.014E+00 V

6) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * -a) None of these are true.
 * -b) $$R_{Total} = 3\Omega$$.
 * +c) $$R_{Total} = 6\Omega$$.
 * -d) $$R_{Total} = 0.5454\Omega$$.

7) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * -a) 3 Joules
 * -b) 5 Joules
 * +c) 25 Joules
 * -d) None of these are true

8) The diameter of a copper wire is 9.2 mm, and it carries a current of 64 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 4.91 x 10-5m/s
 * -b) 5.95 x 10-5m/s
 * +c) 7.2 x 10-5m/s
 * -d) 8.73 x 10-5m/s
 * -e) 1.06 x 10-4m/s

9) A device requires consumes 166 W of power and requires 9.99 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * -a) 1.570E+06 A/m2
 * -b) 1.727E+06 A/m2
 * +c) 1.899E+06 A/m2
 * -d) 2.089E+06 A/m2
 * -e) 2.298E+06 A/m2

10) In the circuit shown V=11.8 V, R1=2.38 &Omega;, R2=5.11 &Omega;, and R3=14.6 &Omega;. What is the power dissipated by R2?


 * -a) 8.489E+00 W
 * -b) 9.338E+00 W
 * +c) 1.027E+01 W
 * -d) 1.130E+01 W
 * -e) 1.243E+01 W

Key: Z2
1) A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
 * -a) $$R_{Total} = 3\Omega$$.
 * +b) $$R_{Total} = 6\Omega$$.
 * -c) None of these are true.
 * -d) $$R_{Total} = 0.5454\Omega$$.

2) In the circuit shown V=16.2 V, R1=2.84 &Omega;, R2=7.06 &Omega;, and R3=13.1 &Omega;. What is the power dissipated by R2?


 * +a) 1.418E+01 W
 * -b) 1.560E+01 W
 * -c) 1.716E+01 W
 * -d) 1.887E+01 W
 * -e) 2.076E+01 W

3) An ideal 3.6 V voltage source is connected to two resistors in parallel.  One is 2.2$$k\Omega$$, and the other is 4.2 $$k\Omega$$.  What is the current through the larger resistor?


 * -a) 0.43 mA.
 * -b) 0.49 mA.
 * +c) 0.56 mA.
 * -d) 0.65 mA.
 * -e) 0.74 mA.

4) Imagine a substance could be made into a very hot filament. Suppose the resitance is 1.52 &Omega; at a temperature of 45&deg;C and that the temperature coefficient of expansion is 4.330E-03 (&deg;C)&minus;1). What is the resistance at a temperature of 479 &deg;C?


 * -a) 3.970E+00 &Omega;
 * -b) 4.168E+00 &Omega;
 * +c) 4.376E+00 &Omega;
 * -d) 4.595E+00 &Omega;
 * -e) 4.825E+00 &Omega;

5) A 129 Watt DC motor draws 0.22 amps of current. What is effective resistance?


 * -a) 2.2 x 103 &Omega;
 * +b) 2.67 x 103 &Omega;
 * -c) 3.23 x 103 &Omega;
 * -d) 3.91 x 103 &Omega;
 * -e) 4.74 x 103 &Omega;

6) A battery has an emf of 5.6 volts, and an internal resistance of 460 $$k\Omega$$. It is connected to a 2.4 $$M\Omega$$ resistor.  What power is developed in the 2.4  $$M\Omega$$ resistor?


 * -a) 6.05 $$\mu$$W.
 * -b) 6.96 $$\mu$$W.
 * -c) 8 $$\mu$$W.
 * +d) 9.2 $$\mu$$W.
 * -e) 10.58 $$\mu$$W.

7) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)


 * -a) 3.07 x 10-5m/s
 * -b) 3.72 x 10-5m/s
 * -c) 4.5 x 10-5m/s
 * -d) 5.46 x 10-5m/s
 * +e) 6.61 x 10-5m/s

8) A device requires consumes 196 W of power and requires 2.4 A of current which is supplied by a single core 10-guage (2.588 mm diameter) wire. Find the magnitude of the average current density.


 * +a) 4.563E+05 A/m2
 * -b) 5.019E+05 A/m2
 * -c) 5.521E+05 A/m2
 * -d) 6.073E+05 A/m2
 * -e) 6.680E+05 A/m2

9) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
 * -a) 5 Joules
 * -b) None of these are true
 * +c) 25 Joules
 * -d) 3 Joules

10) Two sources of emf &epsilon;1=26.2 V, and  &epsilon;2=11.5 V are oriented as shownin the circuit. The resistances are R1=2.13 k&Omega; and  R2=1.72 k&Omega;.  Three other currents enter and exit or exit from portions of the circuit that lie outside the dotted rectangle and are not shown.  I3=3.11 mA and I4=0.746 mA enter and leave near R2, while the current I5 exits near R1.What is the magnitude (absolute value) of voltage drop across R1?


 * -a) 4.275E+00 V
 * -b) 4.703E+00 V
 * +c) 5.173E+00 V
 * -d) 5.691E+00 V
 * -e) 6.260E+00 V