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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 `8xx16^(-6)m^(2)`. If `0.2` A current is flowing through the wire, the potential gradient will be

A

`0.1 Vm^(-1)`

B

`10^(-2)Vm^(-1)`

C

`10^(-3)Vm^(-1)`

D

`10^(-4)Vm^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
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