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Q.

A conducting wire of cross-sectional area 1cm2 has 3×1023m−3 charge carriers per unit volume. If wire carries a current of 24mA, the drift speed of the carrier is:

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a

0.5m/s

b

5×10−3m/s 

c

5×10−6m/s

d

5×10−2m/s

answer is B.

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Detailed Solution

vd=ineA=24×1033×1023×1.6×10−19×10−4=5×10−3m/s

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