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A current of 10 A exists in a wire of cr...

A current of 10 A exists in a wire of crossectional area of 5 `m m^(2)` with a drift velocity of `2 xx 10^(-3) ms^(-1)` . The number of free electrons in each cubic meter of the wire is `"___________"`

A

`1 xx 10^(23)`

B

`625 xx 10^(25)`

C

` 2 xx 10^(25)`

D

`2 xx 10^(6)`

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