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Unformatted text preview: benavides (jjb2356) – homework 13 – Turner – (59130) 1 This printout should have 12 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 3) 10.0 points A total charge of 16 mC passes through a crosssectional area of a nichrome wire in 1 . 6 s. a) What is the current in the wire? Correct answer: 0 . 01 A. Explanation: Let : Δ Q 1 = 16 mC and Δ t 1 = 1 . 6 s . I = Δ Q Δ t = . 016 C 1 . 6 s = . 01 A . 002 (part 2 of 3) 10.0 points b) How many electrons pass through the crosssectional area in 4.00 s? Correct answer: 2 . 5 × 10 17 . Explanation: Let : q e = 1 . 6 × 10 19 C and Δ t 2 = 4 . 00 s . Δ Q = N q e N = Δ Q q e = I Δ t 2 q e = (0 . 01 A)(4 s) 1 . 6 × 10 19 C = 2 . 5 × 10 17 . 003 (part 3 of 3) 10.0 points c) If the number of charges that pass through the crosssectional area during the given time interval doubles, what is the resulting cur rent? Correct answer: 0 . 02 A. Explanation: Let : Δ Q 2 = 2 Δ Q 1 . I = 2 Δ Q 1 Δ t 1 = 2 (0 . 016 C) 1 . 6 s = . 02 A . 004 (part 1 of 2) 10.0 points The current in a conductor varies over time as shown in the figure. 1 2 3 4 5 6 7 1 2 3 4 5 6 1 2 3 4 5 6 7 1 2 3 4 5 6 Current(A) Time(s) How much charge passes through a cross section of the conductor in the time interval t = 0 s to t = 4 . 5 s?...
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 Spring '08
 Turner
 Charge, Work, ohm, Electric charge, Electrical resistance, E1 E2 E1

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