Quizbank/Electricity and Magnetism (calculus based)/QBCh11

QB153086031104

QB:Ch 11:V1
QB153086031104 1) A charged particle in a magnetic field of 1.750E-04 T is moving perpendicular to the magnetic field with a speed of 2.330E+05 m/s. What is the period of orbit if orbital radius is 0.893 m?
 * a) 2.189E-05 s
 * b) 2.408E-05 s
 * c) 2.649E-05 s
 * d) 2.914E-05 s
 * e) 3.205E-05 s

2) A 72 cm-long horizontal wire is maintained in static equilibrium by a horizontally directed magnetic field that is perpendicular to the wire (and to Earth's gravity). The mass of the wire is 14 g, and the magnitude of the magnetic field is 0.54 T. What current is required to maintain this balance?
 * a) 2.651E-01 A
 * b) 2.916E-01 A
 * c) 3.208E-01 A
 * d) 3.529E-01 A
 * e) 3.882E-01 A

3) A circular current loop of radius 1.88 cm carries a current of 3.41 mA. What is the magnitude of the torque if the dipole is oriented at 62 &deg; to a uniform magnetic fied of 0.415 T?
 * a) 1.387E-06 N m
 * b) 1.526E-06 N m
 * c) 1.679E-06 N m
 * d) 1.847E-06 N m
 * e) 2.031E-06 N m