oldmidterm 02-problems

# oldmidterm 02-problems - riegel(kmr996 oldmidterm 02...

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riegel (kmr996) – oldmidterm 02 – turner – (56725) 1 This print-out should have 19 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A capacitor network is shown in the following figure. 17 . 9 V 5 . 79 μ F 6 . 2 μ F 10 . 4 μ F a b What is the voltage across the 6 . 2 μ F upper right-hand capacitor? Answer in units of V. 002 (part 1 of 2) 10.0 points A coaxial cable with length has an inner conductor that has a radius a and carries a charge of Q . The surrounding conductor has an inner radius b and a charge of - Q . Assume the region between the conductors is air. The linear charge density λ Q . radius = a + Q radius = b - Q What is the electric field halfway between the conductors? 1. E = Q 2 π 0 r 2 2. E = Q π 0 r 2 3. E = λ 2 π 0 r 4. E = λ π 0 r 2 5. E = λ π 0 r 6. E = λ 2 π 0 r 2 7. E = Q π 0 r 8. E = Q 2 π 0 r 9. E = λ 4 π 0 r 10. E = Q 4 π 0 r 003 (part 2 of 2) 10.0 points What is the capacitance C of this coaxial cable? 1. C = k e 2 ln b a 2. C = 2 k e 3. C = a 2 k e b 4. C = k e ln b a 5. C = k e 6. C = 2 k e ln b a 7. C = 2 k e ln a b 8. C = k e ln b a 9. C = 2 k e ln b a

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riegel (kmr996) – oldmidterm 02 – turner – (56725) 2 10. C = k e ln a b 004 (part 1 of 4) 10.0 points Four capacitors are connected as shown in the figure. 21 . 8 μ F 63 . 1 μ F 41 . 7 μ F 84 . 6 μ F 92 . 5 V a b c d Find the capacitance between points a and b of the entire capacitor network.
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