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An electric cell of e.m.f E is connected...

An electric cell of e.m.f E is connected across a copper wire of diameter d and length l. The drift velocity of electrons in the wire is `v_(d)`. If the length of the wire is changed to 2l, the new drift velocity of electrons in the copper wire will be

A

`v_(d)`

B

`2v_(d)`

C

`v_(d)//2`

D

`v_(d)//4`

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