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s04x2aan - NAME PHYS-1200 PHYSICS II QUIZ 2 SOLUTIONS PART...

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NAME PHYS-1200 PHYSICS II QUIZ 2 MARCH 24, 2004 SOLUTIONS PART A. 1. E 5. C 8. D 2. A 6. D 3. B 7. D 4. B PART B . 1. a) DECREASING According to the right hand rule, the displacement current must be directed upward to produce the magnetic field shown, so the electric field must be decreasing. b) DECREASING According to the right hand rule, the displacement current must be directed downward to produce the magnetic field shown, so the electric field must be decreasing. 2. a) f = f beat , so f = 5.0 Hz b) LOWER THAN THE TUNING FORK Increasing the tension increased the wave speed in the string, and therefore increased the frequency. Since the beat frequency decreased, raising the frequency of the string brought its frequency closer to that of the tuning fork. Therefore, it started out lower than the tuning fork. 3. a) The direction of the displacement current is the same as the current in the wire. b) The emf in the inductor opposes the increasing current.
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NAME PART C .
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