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A copper rod of cross sectional area A c...

A copper rod of cross sectional area A carries a uniform current I through it. At temperature T if the volume charge density of the rod is `rho` how long will the charges take to travel a distance d?

A

`(rho d A)/(I)`

B

`(rho d A)/(I T)`

C

`(2 rho d A)/(I T)`

D

`(2 rho d A)/(I)`

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