a) An electrician wishes to cut an iron wire (p = 9.71x 10-° Om) that has 250 of resistance. The wire has a radius of 0.450mm. Approximately what length of wire has a resistance equal to the maximum 250

a) An electrician wishes to cut an iron wire (p = 9.71x 10-° Om) that has 250 of resistance. The wire has a radius of 0.450mm. Approximately what length of wire has a resistance equal to the maximum 250

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 70AP: A 10.00-meter long wire cable that is made of copper has a resistance of 0.051 ohms, (a) What is the...

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Concept explainers

Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.

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a) An electrician wishes to cut an iron wire (p = 9.71×10-8 Om) that has 250 of resistance. The wire has a radius
of 0.450mm. Approximately what length of wire has a resistance equal to the maximum 250

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