A copper wire of diameter 0.86 mm carries a constant current of 0.18 A to a 40 W bulb. The free-electron density in the wire is 6.3 x 1028 per cubic meter. Find (a) the current density and (b) the drift speed.

A copper wire of diameter 0.86 mm carries a constant current of 0.18 A to a 40 W bulb. The free-electron density in the wire is 6.3 x 1028 per cubic meter. Find (a) the current density and (b) the 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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