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Unformatted text preview: Version 085/ABBBB QTest #4 Antoniewicz (56495) 1 This print-out should have 3 questions. Multiple-choice 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