1.

The drift velocity of free electrons in a conductor is ?v? when a current ?i? is flowing in it.  If both the radius and current are doubled, then drift velocity will be                   [BHU 2002]

A.            v    
B.            \[\frac{v}{2}\]
C.            \[\frac{v}{4}\]                      
D.            \[\frac{v}{8}\]
Answer» C.            \[\frac{v}{4}\]                      


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