Answered: 2) You measure a wire's resistance to…

2) You measure a wire's resistance to be 0.0125 Ohms. If you stretch the wire, doubling its length, and you make sure to not change the volume of the wire, what is its new resistance?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter22: Electric Current

Section: Chapter Questions

Problem 91A

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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

Amps in the wire if the wire has the following resistance values: (a)
(b) R = 2 Ohms, (c) R = 3 Ohms
2) You measure a wire's resistance to be 0.0125 Ohms. If you stretch the wire,
doubling its length, and you make sure to not change the volume of the wire,
what is its new resistance?

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