An 18 gauge copper wire (the size usually used for lamp cords), with a diameter of 1.02 mm, carries a constant current of 1.67 A to a 200 W lamp. The free-electron density in the wire is 8.5 x 1028 per cubic meter. Find (a) the current density and (b) the drift speed.
An 18 gauge copper wire (the size usually used for lamp cords), with a diameter of 1.02 mm, carries a constant current of 1.67 A to a 200 W lamp. The free-electron density in the wire is 8.5 x 1028 per cubic meter. Find (a) the current density and (b) the drift speed.
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Transcribed Image Text:An 18 gauge copper wire (the size usually used for lamp cords), with a
diameter of 1.02 mm, carries a constant current of 1.67 A to a 200 W
lamp. The free-electron density in the wire is 8.5 x 1028 per cubic
meter. Find (a) the current density and (b) the drift speed.
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