Answered: 4. A small but measurable current of…

4. A small but measurable current of 123 pA exists in a copper wire whose diameter is 2.46 mm. Calculate (a) the current density and (b) the electron drift speed.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 33P: The current supplied to an ail conditioner unit is 4.00 amps. The air conditioner is wired using a...

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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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4. A small but measurable current of 123 pA exists in a copper
wire whose diameter is 2.46 mm. Calculate (a) the current
density and (b) the electron drift speed.

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