Estimate the average drift speed of the conduction electrons in a copper wire with a cross sectional area of 3.5 x 107m² and carrying a current of 2.8 A. Assume the density of conduction electrons in a wire is 7x1028 m3.

Estimate the average drift speed of the conduction electrons in a copper wire with a cross sectional area of 3.5 x 107m² and carrying a current of 2.8 A. Assume the density of conduction electrons in a wire is 7x1028 m3.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 73AP: When 100.0 V is applied across a 5-gauge (diameter 4.621 mm) wire that is 10 m long, the magnitude...

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

9. Estimate the average drift speed of the conduction electrons in a copper wire with a cross sectional
area of 3.5 x 10-7m² and carrying a current of 2.8 A. Assume the density of conduction electrons in
a wire is 7x1028 m3.

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