The diameter of 0-gauge copper wire is 8.252 mm. Find the resistance of a 1.00-km length of such wire used for power transmission, taking into account the thermal expansion of the tungsten filament. You may assume a thermal expansion coefficient of 12×10−6/C. By what percentage does your answer differ from the one you get without taking the thermal expansion into account? a) 4.5Ω (total), 7.1% decrease b) 0.34Ω (total), 93% decrease c) 4.7Ω (total), 3.0% decrease d) 5.0Ω (total), 4.2% increase

The diameter of 0-gauge copper wire is 8.252 mm. Find the resistance of a 1.00-km length of such wire used for power transmission, taking into account the thermal expansion of the tungsten filament. You may assume a thermal expansion coefficient of 12×10−6/C. By what percentage does your answer differ from the one you get without taking the thermal expansion into account? a) 4.5Ω (total), 7.1% decrease b) 0.34Ω (total), 93% decrease c) 4.7Ω (total), 3.0% decrease d) 5.0Ω (total), 4.2% increase

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 14P

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