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Unformatted text preview: Create assignment, 00224, Homework 5, Feb 21 at 6:55 pm 1 This printout should have 10 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. The due time is Central time. Reforming a Wire 27:03, trigonometry, numeric, > 1 min, nor mal. 001 A 12 metal wire is cut into three equal pieces that are then connected side by side to form a new wire the length of which is equal to onethird the original length. What is the resistance of this new wire? Correct answer: 1 . 33333 . Explanation: Let : R = 12 , = 1 3 , and A = 3 A . The original resistance was R = A and the new resistance is R = 3 3 A = 1 9 R = 1 9 (12 ) = 1 . 33333 . keywords: Resistance and Resistivity 27:03, trigonometry, numeric, > 1 min, nor mal. 002 A wire is made of a material with a resistivity of 3 . 2 10 8 m. It has length 2 . 5 m and diameter 0 . 5 mm. What is the resistance of the wire? Correct answer: 0 . 407437 . Explanation: Let : = 3 . 2 10 8 m , = 2 . 5 m , and r = 0 . 25 mm = 0 . 00025 m ....
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This note was uploaded on 04/08/2011 for the course PHYS 1402 taught by Professor Avram during the Spring '10 term at Austin Community College.
 Spring '10
 Avram
 Physics, Work

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