The time variation of the charge passing by a conductor is given by q(t)=2+2t, where q is given in coulombs and t in seconds. The cross-sectional area of the conductor is 1.6 mm-. Find the current density (in MA/m-) through the conductor at t= 6.2 s.

The time variation of the charge passing by a conductor is given by q(t)=2+2t, where q is given in coulombs and t in seconds. The cross-sectional area of the conductor is 1.6 mm-. Find the current density (in MA/m-) through the conductor at t= 6.2 s.

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 69PQ

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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.

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The time variation of the charge passing by a conductor is given by q(t)=2t+2t, where q is given in coulombs and t in seconds. The cross-sectional area of the conductor is 1.6
mm-. Find the current density (in MA/m-) through the conductor at t= 6.2 s.

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