An 18-gauge copper wire with a diameter of 1.05-mm carries a constant current of 1.96-A. The charge concentration in the wire is 8.5 x 1028 per cubic meter. Determine the electric field in mN/C. Use q = 1.602 x 10-19 and resistivity equal to 1.72x10-8 ohm-m.

An 18-gauge copper wire with a diameter of 1.05-mm carries a constant current of 1.96-A. The charge concentration in the wire is 8.5 x 1028 per cubic meter. Determine the electric field in mN/C. Use q = 1.602 x 10-19 and resistivity equal to 1.72x10-8 ohm-m.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 28P: An aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the...

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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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An 18-gauge copper wire with a diameter of 1.05-mm carries a constant current of 1.96-A. The charge concentration in the wire is 8.5 x 10²⁸ per cubic meter. Determine the electric field in mN/C. Use q = 1.602 x 10^-19and resistivity equal to 1.72x10^-8 ohm-m.

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