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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

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

B

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

C

`( rho d A)/(I)`

D

`(rho d A)/(IT)`

Text Solution

Verified by Experts

The correct Answer is:
C
Charge density `rho = ("charge")/("volume")= (q)/("Ad") rArr q = rho Ad`
Also, `q = IT rArr T = (q) (I) = (rho AD)/ (I ) `
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