A current of 5 A exists in a copper wire of length 50 m and diameter of 2.5 mm when applying a potential difference of 0.86 V. Assuming the current is uniform, calculate (a) the current density (b) electron drift speed. (c) the copper conductivity

A current of 5 A exists in a copper wire of length 50 m and diameter of 2.5 mm when applying a potential difference of 0.86 V. Assuming the current is uniform, calculate (a) the current density (b) electron drift speed. (c) the copper conductivity

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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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

A current of 5 A exists in a copper wire of length 50 m and diameter of 2.5 mm when applying a
potential difference of 0.86 V. Assuming the current is uniform, calculate
(a) the current density
(b) electron drift speed.
(c) the copper conductivity

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