Answered: A wire of resistivity 2.8 x 10^-8 ohm.…

A wire of resistivity 2.8 x 10^-8 ohm. m and length 20-m must dissipate electrical energy at a rate less than 3.0- W when a 15-A current flows. Calculate the minimum cross-sectional area of the wire.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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Question

A wire of resistivity 2.8 x 10^-8 ohm. m and length 20-m must dissipate electrical energy at a rate less than 3.0-
W when a 15-A current flows. Calculate the minimum cross-sectional area of the wire.

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