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A potentiometer has uniform potential gr...

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is `10^(-7)` ohm-metre and the current passing through it is `0.1` ampere, cross-section of the wire is `10^(-6)" m"^(2)`. The potential gradient along the potentiometer wire is

A

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

B

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

C

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

D

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

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