A current i is flowing through the wire ...

A current `i` is flowing through the wire of diameter (d) having drift velocity of electrons `v_(d)` in it. What will be new drift velocity when diameter of wire is made `d//4`?

`4v_(d)`

`v_(d)/4`

`16v_(d)`

`v_(d)/16`

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The correct Answer is:

`therefore` Current, `I=nAev_(d)` or `V_(d) propto 1/A`
If diameter of wire is `d/4`, then area will be `A/16`, so new drift velocity = 16v_(d)`.

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