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Unformatted text preview: lakha (ml29327) HW#5 Jaafari (1444) 1 This printout should have 10 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 2) 10.0 points Consider the circuit 100 V 2 F 4 F 3 F 5 F a b c What is the equivalent capacitance for this network? 1. C equivalent = 7 F correct 2. C equivalent = 7 3 F 3. C equivalent = 14 F 4. C equivalent = 3 2 F 5. C equivalent = 10 7 F Explanation: E B C 1 C 2 C 3 C 4 a b c Let : C 1 = 2 F , C 2 = 4 F , C 3 = 3 F , C 4 = 5 F , and E B = 100 V . The equivalent capacitance of capacitors C 1 and C 2 (parallel) is C 12 = C 1 + C 2 = 6 F . C 12 and C 3 are in series, so 1 C 123 = 1 C 12 + 1 C 3 = C 3 + C 12 C 12 C 3 C 123 = C 12 C 3 C 3 + C 12 = (6 F) (3 F) 6 F + 3 F = 2 F . C 123 and C 4 are parallel, so C = C 4 + C 123 = 7 F . 002 (part 2 of 2) 10.0 points What is the charge stored in the 5 F lower right capacitor? 1. Q 1 = 360 C 2. Q 1 = 1 , 100 C 3. Q 1 = 500 C correct 4. Q 1 = 710 C 5. Q 1 = 1 , 800 C Explanation: Let : C 4 = 5 F and E B = 100 V . The charge stored in a capacitor is given by Q = C V , so, Q 4 = C 4 V = (5 F) (100 V) = 500 C . 003 10.0 points A parallelplate capacitor has a capacitance C . A second parallelplate capacitor has plates with twice the area and twice the sepa ration. lakha (ml29327) HW#5 Jaafari (1444) 2 The capacitance of the second capacitor is most nearly 1....
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This note was uploaded on 09/17/2011 for the course PHYS 1401 taught by Professor Violaruck during the Fall '07 term at Dallas Colleges.
 Fall '07
 ViolaRuck

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