A conducting wire of cross-sectional area 1 cm 2 has 3 × × 10 23 m –3 charge carriers. If wire carries a current of 24 mA, the drift speed of the carrier is
Text Solution
Verified by ExpertsThe correct answer is:
B
The current 
crossing area of cross-section 
can be expressed in terms of drift velocity 
and the moving charges as
where, 
is number of charge carriers per unit volume and 
the charge on the carrier.
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