Copper contains 8.4 *10²⁸ free electrons per cubic meter.A copper wire of cross-sectional area 7.4 *10^-7 m² carries a current of 1 A.The electron drift speed is approximately: A)3 * 10⁸ m/s B)10³ m/s C)1 m/s D)10^-4 m/s E)10^-23 m/s

Name: Copper contains 8.4 *10 28 free electrons per cubic meter.A copper wire of cross-sectional area 7.4 *10 -7 m 2 carries a current of 1 A.The electron drift speed is approximately: A)3 * 10 8 m/s B)10 3 m/s C)1 m/s D)10 -4 m/s E)10 -23 m/s
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The Answer is D

Copper Contains 8