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At room temperature, copper has free ele...

At room temperature, copper has free electron density of `8.4xx10^(28)"m"^(-3)`. The electron drift velocity in a copper conductor of cross - sectional area `10^(-6)m^(2)` and carrying a current of 5.4A, will be -

A

`4 m s^(-1)`

B

`0.4 ms^(-1)`

C

`4 cm s^(-1)`

D

`0.4 mm s^(-1)`

Text Solution

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The correct Answer is:
D
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