54S07FinalBlank

54S07FinalBlank - Physics 54 S07 Final Exam Name Part I:...

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Physics 54 S07 Final Exam Name Section: Part I: Short Answer (3pts each) Circle the best answer: Q q 1) A cube of copper (good conductor) has a defect (bubble) in the casting and contains a charge q = 1 mC (not touching the conductor). The net charge on the conducting cube is –2 mC. The net charge on the outer surface of the cube is. a) –1 mC. b) 1 mC. c) –2 mC d) – 2 mC. 2) I 1 2 v 1 v 2 A current I flows in a straight wire. Two rectangular loops move as shown. The flow of induced current a) is clockwise for loop 1 and zero for loop 2. b) is zero for loop 1 and counterclockwise for loop 2. c) is zero for loop 1 and clockwise for loop 2. d) is counterclockwise for loop 1 and clockwise for loop 2.
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+ - 10V d c b a 3) Four identical bulbs are connected as shown. Which is the brightest? a) a and b are equally bright and brighter than the others. b) c is brighter than the others. c) d is brighter than the others. d) The bulbs are all equally bright. E B 4) An electromagnetic wave has an electric field of the form E = E max cos(kx- ω t) j. When E is along the positive j direction, which way does the B-field point? a) in the +x direction. b) in the –x direction. c) in the +z direction. d) in the –z direction.
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Q R 5) A charge Q is enclosed in a volume made of a hemisphere of radius R and a cone as shown. The net flux out of the surface of the cone is a) – Q/ ε 0 .. b) – ½ Q/ ε 0 . c) + ½ Q/ ε 0 d) + Q/ ε 0 . I Q 6) A current carrying wire passes through a hexagonal closed volume. A charge Q is outside. a) The net magnetic flux out of the volume is nonzero, while the net electric flux is zero. b) The net magnetic flux and the net electric flux out of the volume are both zero. c) The net electric flux out of the volume is not zero, while the net magnetic flux is zero. d) The net magnetic flux and net electric flux out the volume are both nonzero.
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O 7) Two lenses with positive focal lengths are used to image an object O . The final image is a) always real and upright. b) sometimes real and upright. c) always virtual and inverted. d) never virtual and inverted. R R R 8) I I The power dissipated in the resistors is. a) 2 I 2 R b) 5/4 I 2 R c) 3/2 I 2 R d) 5/2 I 2 R.
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q 9) A fixed charge q is at the center of a circle of radius R in zero magnetic field. The line integral of the electric field due to the charge around the circle in the CCW direction a) decreases with increasing radius. b) is nonzero.
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This note was uploaded on 05/13/2010 for the course PHYSICS 54L taught by Professor Thomas during the Spring '09 term at Duke.

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54S07FinalBlank - Physics 54 S07 Final Exam Name Part I:...

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