The total amount of charge that has entered a wire at time tt is given by the expression Q=(20C)(1−e−t/(2.0s)), where t is in seconds and t≥0 1.Find an expression for the current in the wire at time t.

The total amount of charge that has entered a wire at time tt is given by the expression Q=(20C)(1−e−t/(2.0s)), where t is in seconds and t≥0 1.Find an expression for the current in the wire at time t.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 65PQ

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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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The total amount of charge that has entered a wire at time tt is given by the expression Q=(20C)(1−e^−t/(2.0s)), where t is in seconds and t≥0

1.Find an expression for the current in the wire at time t.

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