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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-meter 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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