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Unformatted text preview: Version 085/ABBBB QTest #4 Antoniewicz (56495) 1 This printout should have 3 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 2) 5.0 points Suppose that a uniform wire of resistance R is stretched uniformly to N times its original length. Assume the total volume of the wire re mains the same, and the volume is given by the product of the cross sectional area and the length. Denote the original area by A and the area after the stretch by A . The ratio A A is 1. A A = 1 N 2 2. A A = N 3. A A = 1 N 4. A A = 1 N 2 / 3 5. A A = N 3 / 2 6. A A = 1 7. A A = 0 8. A A = 1 N correct 9. A A = N 2 10. A A = N Explanation: Let : = N . The volume before the stretch is V = A where is the length. The volume after the stretch is V = A = A N ....
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This note was uploaded on 10/01/2010 for the course PHYSICS PHY 303 L taught by Professor Antoniewicz during the Spring '10 term at Texas Pan American.
 Spring '10
 ANTONIEWICZ
 Physics

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