A small but measurable current of 1.2 * 10-10 A exists in a copper wire whose diameter is 2.5 mm.The number of charge carriers per unit volume is 8.49 * 10^28 m-3. Assuming the current is uniform, calculate the (a) current density and (b) electron drift speed.

A small but measurable current of 1.2 * 10-10 A exists in a copper wire whose diameter is 2.5 mm.The number of charge carriers per unit volume is 8.49 * 10^28 m-3. Assuming the current is uniform, calculate the (a) current density and (b) electron drift speed.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 31P: Consider a wire of a circular cross-section with a radius of R = 3.00mm. The magnitude of the...

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Question

A small but measurable current of 1.2 * 10-10 A exists in a
copper wire whose diameter is 2.5 mm.The number of charge carriers
per unit volume is 8.49 * 10^28 m-3. Assuming the current is uniform,
calculate the (a) current density and (b) electron drift speed.

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