A current `I` flows through a uniform wire of diameter `d` when the mean electron drift velocity is `v`. The same current will flow though a wire of diameter `d//2` made of the same material if the mean drift velocity of the electron isA. `v//4`B. `v//2`C. `2v`D. `4v`

A current `I` flows through a uniform wire of diameter `d` when the me

1.	A current `I` flows through a uniform wire of diameter `d` when the mean electron drift velocity is `v`. The same current will flow though a wire of diameter `d//2` made of the same material if the mean drift velocity of the electron isA. `v//4`B. `v//2`C. `2v`D. `4v`
Answer» Correct Answer - D `I="ne"A_(1)v_(1)="ne"A_(2)v_(2)` `"ne"pi(d/2)^(2)v="ne"pi(d/4)^(2)v_(2)implies v_(2)=4v`

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