A conductor has a cross-sectional area of 2.3 × 10^-6 m^2 and the number of free electrons per unit volume is 8.5 × 10^28 electron/m^3. When the current is 13.7 A, find the drift speed (in mm/s) of the electrons.

A conductor has a cross-sectional area of 2.3 × 10^-6 m^2 and the number of free electrons per unit volume is 8.5 × 10^28 electron/m^3. When the current is 13.7 A, find the drift speed (in mm/s) of the electrons.

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 17P

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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.

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