An 18-gauge copper wire with a diameter of 3-mm carries a constant current of 1.2-A. The charge concentration in the wire is 8.5 x 1028 per cubic meter. Determine the current density in kA/m2.

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An 18-gauge copper wire with a diameter of
3-mm carries a constant current of 1.2-A.
The charge concentration in the wire is 8.5
x 1028 per cubic meter. Determine the
current density in kA/m2.
Transcribed Image Text:An 18-gauge copper wire with a diameter of 3-mm carries a constant current of 1.2-A. The charge concentration in the wire is 8.5 x 1028 per cubic meter. Determine the current density in kA/m2.
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