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There is a current of 40 A in a wire of ...

There is a current of 40 A in a wire of `10^(-6)` square metre area of cross section , If the number of free electrons per cubic metre is `10^(29)` , then the drift velocity will be

A

`1.25xx10^(3) m//s`

B

`2.5xx10^(-3) m//s`

C

`25xx10^(-3) m//s`

D

`25xx10^(3) m//s`

Text Solution

Verified by Experts

The correct Answer is:
B
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