Answered: A 2.0 mm diameter iron wire (…

A 2.0 mm diameter iron wire ( resistivity, p = 9.7 x 10-8 -m) carries a current of 2.5 A. Determine the potential difference across this 20m length of the wire.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 8P: A 0.900-V potential difference is maintained across a 1.50-m length of tungsten wire that has a...

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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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A 2.0 mm diameter iron wire ( resistivity, p = 9.7 x 10-8 n-m) carries a current of 2.5 A.
Determine the potential difference across this 20m length of the wire.

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