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Unformatted text preview: Version One Homework 5 Savrasov 39819 May 01, 2006 1 This printout should have 7 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. The due time is Central time. Current in Tungsten Wire 27:02, calculus, numeric, > 1 min, normal. 001 (part 1 of 1) 2 points A 0 . 9 V potential difference is maintained across a 1 . 5 m length of tungsten wire that has a crosssectional area of 0 . 6 mm 2 and the resistivity of the tungsten is 5 . 6 10 8 m. What is the current in the wire? Correct answer: 6 . 42857 A. Explanation: Let : V = 0 . 9 V , = 1 . 5 m , A = 0 . 6 mm 2 = 6 10 7 m 2 , and = 5 . 6 10 8 m . The resistance is R = V I = A , so the current is I = V A = (0 . 9 V)(6 10 7 m 2 ) (5 . 6 10 8 m)(1 . 5 m) = 6 . 42857 A . Drift Speed in Copper Wire 27:02, calculus, numeric, > 1 min, normal. 002 (part 1 of 1) 2 points Calculate the average drift speed of electrons traveling through a copper wire with a cross sectional area of 5 . 261 mm 2 when carrying a...
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This note was uploaded on 03/24/2011 for the course PHYS 13843 taught by Professor Dr.andygavrin during the Spring '10 term at IUPUI.
 Spring '10
 Dr.AndyGavrin

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