A spool of copper wire 290 m long and with a diameter of 0.440 mm is at 20.0°C. For copper, the resistivity is 1.70 x 10 8 .m and the temperature coefficient of resistivity is 3.90 x 10- (°C)-1. (a) What is the magnitude of the electric field (in V/m) in the wire if it carries a current of 0.550 A? V/m (b) What is the electric power (in W) delivered to the spool while it carries a current of 0.550 A? W (c) What is the power (in W) delivered to the spool if the potential difference across the wire is held constant and the temperature is increased to 400°C? W

A spool of copper wire 290 m long and with a diameter of 0.440 mm is at 20.0°C. For copper, the resistivity is 1.70 x 10 8 .m and the temperature coefficient of resistivity is 3.90 x 10- (°C)-1. (a) What is the magnitude of the electric field (in V/m) in the wire if it carries a current of 0.550 A? V/m (b) What is the electric power (in W) delivered to the spool while it carries a current of 0.550 A? W (c) What is the power (in W) delivered to the spool if the potential difference across the wire is held constant and the temperature is increased to 400°C? W

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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