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Awire has a current density of 17 amm2 if the drift

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Question: A wire has a current density of 17 A/mm2. If the drift velocity is 4.8×10-8 m/s, how many free electrons does the wire have in a 1.0 m length? The radius of the wire is 1.0 mm.

A.) 2.2 * 10^33
B.) 7.0 * 10^27
C.) 2.2 * 10 ^27
D.) 7.0 * 10 ^21

Please explain answer.

Reference no: EM13593654

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