Q 2613080840.     A copper wire carries a current of density `j = 1.0 A//mm^2` Assuming that one free electron corresponds to each copper atom, evaluate the distance which will be covered by an electron during its displacement `l = 10 mm` along the wire

A

`( n e l < v > )/j`

B

`( n e l > v > )/j`

C

`( n el < v < )/j`

D

`( n e L < v > )/j`

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