54S08Exam2Blank

54S08Exam2Blank - Physics 54 S08 Exam 2 Name Part I: Short...

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Physics 54 S08 Exam 2 Name Section: Part I: Short Answer (3pts each) Circle the best answer: I P 1) Two wires each carry current I out of the page. At the point P, the magnetic field points approximately: a) down. b) up. c) right. d) left. 2) xxxxxx xxxxxx xxxxxx A loop is at rest and is partially inside a magnetic field pointing into the page. The magnetic field is increasing in magnitude. The induced current in the loop flows a) clockwise and the loop is pushed to the right. b) clockwise and the loop is pushed to the left. c) counterclockwise and the loop is pushed to the right. d) counterclockwise and the loop is pushed to the left.
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3) A resistor R = 2 is connected to the secondary of a transformer and an alternating (AC) current I = 10 A is flowing through it. The primary coil has 400 windings, while the secondary coil has 10. What is the AC voltage on the primary coil? a) 100 V b) 200 V c) 400 V. d) 800 V E B E t t = half perio = 0 d 4) At a time t = 0, an electromagnetic wave has an electric field in the positive x-direction (up) and a magnetic field in the positive y-direction (out of the page). After a half cycle, the electric field points in the negative x-direction. The corresponding magnetic field a) is in the +y direction and the wave propagates along –z. b) is in the –y direction and wave propagates along -z. c) is in the +y direction and the wave propagates along z.
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54S08Exam2Blank - Physics 54 S08 Exam 2 Name Part I: Short...

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