A cylindrical cable with 2.10 x 10-80 m resistivity carries a current of 1200 A. There is a potential difference of 1.6 x 10-2 v between two points on the cable that are 0.20 m apart. What is the radius of the cable?

A cylindrical cable with 2.10 x 10-80 m resistivity carries a current of 1200 A. There is a potential difference of 1.6 x 10-2 v between two points on the cable that are 0.20 m apart. What is the radius of the cable?

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 67PQ

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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.

Question

A cylindrical cable with 2.10 x 10-8 m resistivity carries a current of 1200 A. There is a potential difference of 1.6 x 10-2 v between two points on the cable that are 0.20 m apart.
What is the radius of the cable?

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