The current density in a cylindrical wire of radius 4R is given by J = J.(1 –). Density is parallel to the axis. Find the total current passing through the section perpendicular to the axis. a) I = -J,R² b) I = -4),R² 63 c) I = -T),R? d) I = -112nJ,R? 575 e) I =- n],R² - 2

The current density in a cylindrical wire of radius 4R is given by J = J.(1 –). Density is parallel to the axis. Find the total current passing through the section perpendicular to the axis. a) I = -J,R² b) I = -4),R² 63 c) I = -T),R? d) I = -112nJ,R? 575 e) I =- n],R² - 2

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.

Question

The current density in a cylindrical wire of radius 4R is given by J = J.(1 –).
Density is parallel to the axis. Find the total current passing through the section
perpendicular to the axis.
a) I = "J,R²
b) I = -4T],R²
c) I = -T],R²
d) I = -112n],R?
e) I = -n],R²
63
2
575
2

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