Q4) Consider a resistor with length L, uniform cross-sectional area A, and uniform resistivity p that is carrying a current with uniform current density J. Find the electrical power dissipated per unit volume, p. Express your result in terms of (a) E and J; (b) J and p (c) E and p.

Q4) Consider a resistor with length L, uniform cross-sectional area A, and uniform resistivity p that is carrying a current with uniform current density J. Find the electrical power dissipated per unit volume, p. Express your result in terms of (a) E and J; (b) J and p (c) E and p.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 63P: Consider a power plant is located 60 km away from a residential area uses Q-gauge (A=42.40mm2) wire...

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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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Q4) Consider a resistor with length L, uniform cross-sectional area A, and uniform resistivity p that is carrying
a current with uniform current density J. Find the electrical power dissipated per unit volume, p. Express
your result in terms of (a) E and J; (b) J and p (c) E and p.

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