A small but measurable current of 8.2 × 101º A exists in a copper wire whose diameter is 3.3 mm. The number of charge carriers perunit volume is 8.49 × 1028 m 3. Assuming the current is uniform, calculate the (a) current density and (b) electron drift speed.(a) NumberUnits(b) NumberUnits

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A small but measurable current of 8.2 × 1010 A exists in a copper wire whose diameter is 3.3 mm. The number of charge carriers per unit volume is 8.49 × 1028 m ³. Assuming the current is uniform, calculate the (a) current density and (b) electron drift speed. (a) Number Units

A small but measurable current of 8.2 × 1010 A exists in a copper wire whose diameter is 3.3 mm. The number of charge carriers per unit volume is 8.49 × 1028 m ³. Assuming the current is uniform, calculate the (a) current density and (b) electron drift speed. (a) Number Units

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 15P: If the current carried by a conductor is doubled, what happens to (a) the charge carrier density,...

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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.

Question

A small but measurable current of 8.2 × 101º A exists in a copper wire whose diameter is 3.3 mm. The number of charge carriers per
unit volume is 8.49 × 1028 m 3. Assuming the current is uniform, calculate the (a) current density and (b) electron drift speed.
(a) Number
Units
(b) Number
Units

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