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The resitivity of a potentio meter wire ...

The resitivity of a potentio meter wire is, if the area of cross section of the wire is `4cm^(2)`, the current flowing in the circuit is 1A, the poetntial gradient is `7.5(v)/(m)`

A

`3 xx 10^(-3) ohms - m`

B

`2 xx 10^(-6) ohms - m`

C

`4 xx 10^(-6) ohms - m`

D

`5 xx 10^(-4) ohms - m`

Text Solution

Verified by Experts

The correct Answer is:
A
`P.G = (iR)/l` , Resisitivity rho `= (RA)/l`
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