A spool of tungsten wire 320 m long and with a diameter of 0.480 mm is at 20.0°C. For tungsten, the resistivity is 5.60 x 10-8 0 ·m and the temperature coefficient of resistivity is 4.50 x 10-3 (°C)-1. (a) What is the magnitude of the electric field (in V/m) in the wire if it carries a current of 0.450 A? 0.140 V/m (b) What is the electric power (in W) delivered to the spool while it carries a current of 0.450 A? 20.05 (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 370°C? 9.62 1x How is electric power related to electric potential difference and resistance? W

A spool of tungsten wire 320 m long and with a diameter of 0.480 mm is at 20.0°C. For tungsten, the resistivity is 5.60 x 10-8 0 ·m and the temperature coefficient of resistivity is 4.50 x 10-3 (°C)-1. (a) What is the magnitude of the electric field (in V/m) in the wire if it carries a current of 0.450 A? 0.140 V/m (b) What is the electric power (in W) delivered to the spool while it carries a current of 0.450 A? 20.05 (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 370°C? 9.62 1x How is electric power related to electric potential difference and resistance? 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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