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The resistivity of a potentiometer wire ...

The resistivity of a potentiometer wire is `40xx10^(-8)Omega-m` and its area of cross section is `8xx10^(-6)m^(2)`. If 0.2 A current is flowing through the wire the potential gradient will be

A

`10^(-2)(V)/(m)`

B

`10^(-1)(V)/(m)`

C

`3.2xx10^(-2)(V)/(m)`

D

`1(V)/(m)`

Text Solution

Verified by Experts

The correct Answer is:
A
`P.G=(irho)/(A)`
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