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Copper Contains 8

Question 17

Multiple Choice

Copper contains 8.4* 1028 free electrons/m3. 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

Correct Answer:

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