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

B

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

C

`10^(-3)" V"//"m"`

D

`10^(-4)" V"//"m"`

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TARGET PUBLICATION-CURRENT ELECTRICITY -Competitive Thinking
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