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There is a current of 20 amperes in a co...

There is a current of 20 amperes in a copper 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 is

A

`125 xx 10^(-3) m//sec`

B

`12.5 xx 10^(-3)m//sec`

C

`1.25 xx 10^(-3)m//sec`

D

`1.25 xx 10^(-4)m//sec`

Text Solution

Verified by Experts

The correct Answer is:
C
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