A coil of Nichrome wire is 25.0 m long. The wire has a diameter of .400 mm and is at 20.0C. If it carries a 0.400 A current, what are: (a) the magnitude of the electric field in the wire, (b) the power delivered to it?, (c) If the temperature is increased to 340C and the potential difference across the wire remains constant, how much power is delivered?

A coil of Nichrome wire is 25.0 m long. The wire has a diameter of .400 mm and is at 20.0C. If it carries a 0.400 A current, what are: (a) the magnitude of the electric field in the wire, (b) the power delivered to it?, (c) If the temperature is increased to 340C and the potential difference across the wire remains constant, how much power is delivered?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 65PQ

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

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across the wire remains constant, how much power is delivered?

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