S10P2BQuiz4A

# S10P2BQuiz4A - Physics 2B Spring 2010 Quiz 4 Version A 1...

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Physics 2B Spring 2010: Quiz 4 Version A 1 05.21.10 Closed book. No work needs to be shown for multiple-choice questions. 1. There is a current of 1.5 A flowing in a clockwise direction in a single square loop of wire that is in the plane of the paper. If a magnetic field of 0.50 T directed upward, and if each side of the loop has length of 15 cm, then the net magnetic torque acting on the loop is: a. 1.7 × 10 2 N m . b. 1.1 × 10 1 N m . c. 2.3 × 10 1 N m . d. 3.4 × 10 2 N m . e. 0. 2 . Consider an electron 1.00 cm away from a wire with a current of 1.00 A directed upwards. If the electron moves at a velocity of 1.00 m/s to the left, what is the magnitude of the magnetic force exerted on this electron due to the wire? a. 1.60 × 10 27 N b. 8.93 × 10 30 N c. 2.02 × 10 23 N d. 2.02 × 10 25 N e. 3.21 × 10 24 N 3 . Consider an electron 1.00 cm away from a wire with a current of 1.00 A directed upwards. If the electron moves at a velocity of 1.00 m/s to the left, what is the direction of the magnetic force exerted on this electron due to the wire? a. into the page. b. out of the page. c. upward. d. downward. e. to the right.

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Physics 2B Spring 2010: Quiz 4 Version A 2 05.21.10 4. An unusual message delivery system is pictured in the figure. A 15-cm conductor that is free
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S10P2BQuiz4A - Physics 2B Spring 2010 Quiz 4 Version A 1...

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