An electrician wishes to cut a copper wire (p%3D1.724x10^-80m) that has no more than 100 of resistance. The wire has a radius of 0.725mm. Approximately what length of wire has a resistance equal to the maximum 100 ?

An electrician wishes to cut a copper wire (p%3D1.724x10^-80m) that has no more than 100 of resistance. The wire has a radius of 0.725mm. Approximately what length of wire has a resistance equal to the maximum 100 ?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter21: Circuits And Dc Instruments

Section: Chapter Questions

Problem 15CQ: Given a battery, an assortment of resistors, and a variety of voltage and current measuring devices,...

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

Resistivity Example No2
An electrician wishes to cut a copper wire
(p=1.724x10^-80m) that has no more than 100 of
resistance. The wire has a radius of 0.725mm.
Approximately what length of wire has a resistance
equal to the maximum 100 ?

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