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Copper Has 8 ×\times 1028 Current Carrying Electrons Per M3 ×\times 10-6 M/s

Question 28

Multiple Choice

Copper has 8.5 ×\times 1028 current carrying electrons per m3.A copper wire carries a current of 17 mA,and the drift velocity of the electrons is measured to be 18 ×\times 10-6 m/s.What is the wire radius?


A) 0.15 mm
B) 0.27 mm
C) 2.7 mm
D) 1.5 mm

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