When a current I is set up in a wire of radius r, the drift
velocity is vd. If the same current is set up through a wire of
radius 2 r, the drift velocity will be
(a) 4 vd (b) 2 vd
(c) vd/2 (d) vd/4
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Answered by
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Explanation:
thus option (d) is right answer.
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