Quizbank/Electricity and Magnetism (calculus based)/QBCh7

QB153086031104

QB:Ch 7:V1
QB153086031104 1) An electron gun has parallel plates separated by 3.02 cm and gives electrons 39 keV of energy. What force would the field between the plates exert on a 0.699 &mu;C charge that gets between the plates?
 * a) 8.206E-01 N
 * b) 9.027E-01 N
 * c) 9.930E-01 N
 * d) 1.092E+00 N
 * e) 1.201E+00 N

2) When a 7.78 V battery operates a 1.35 W bulb, how many electrons pass through it each second?
 * a) 7.397E+17 electrons
 * b) 8.137E+17 electrons
 * c) 8.951E+17 electrons
 * d) 9.846E+17 electrons
 * e) 1.083E+18 electrons

3) A diploe has a charge magnitude of q=7 nC and a separation distance of d=4.08 cm. The dipole is centered at the origin and points in the y-direction as shown. What is the electric potential at the point (x=3.16 cm, y=2.04 cm)? Note that following the textbook's example, the y-value of the field point at 2.04 cm matches the disance of the positive charge above the x-axis.
 * a) 7.017E+02 V
 * b) 7.718E+02 V
 * c) 8.490E+02 V
 * d) 9.339E+02 V
 * e) 1.027E+03 V