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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: 3×108 m/s 103 m/s 1 m/s 10−4 m/s 10−23 m/s

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: 3×108 m/s 103 m/s 1 m/s 10−4 m/s 10−23 m/s

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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: 3 × 10 8 m / s 10 3 m / s 1 m / s 10 − 4 m / s 10 − 23 m / s

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