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. The cross-sectional area is 0.0000015-m2. Determine the electric field in mN/C. Use q = 1.602 x 10-19 and resistivity equal to 1.72x10-8 ohm-m.

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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. The cross-sectional area is 0.0000015-m2. Determine the electric field in mN/C. Use q = 1.602 x 10-19 and resistivity equal to 1.72x10-8 ohm-m.

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