An aluminum wire having a cross-sectional area equal to 2.00 x 10-6 m² carries a current of 7.00 A. The density of aluminum is 2.70 g/cm³. Assume each aluminum atom supplies one conduction electron per atom. Find the drift speed of the electrons in the wire. mm/s Need Help? Read It

An aluminum wire having a cross-sectional area equal to 2.00 x 10-6 m² carries a current of 7.00 A. The density of aluminum is 2.70 g/cm³. Assume each aluminum atom supplies one conduction electron per atom. Find the drift speed of the electrons in the wire. mm/s Need Help? Read It

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 7P

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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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An aluminum wire having a cross-sectional area equal to 2.00 × 10-6 m² carries a current of 7.00 A. The density of aluminum is 2.70 g/cm³. Assume each aluminum atom
supplies one conduction electron per atom. Find the drift speed of the electrons in the wire.
mm/s
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