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When a current I is set up in a wire of ...

When a current I is set up in a wire of radius r, the drift velocity is `v_(d)`. If the same current is set up through a wire of radius 2r, the drift speed will be

A

`4v_d`

B

`2v_d`

C

`(v_d)/2`

D

`(v_d)/4`

Text Solution

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The correct Answer is:
D
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