If specific resistance of a potentiomete...

If specific resistance of a potentiometer wire is `10^(–7 ) Omega m`, the current flow through it is `0.1 A` and the cross-sectional area of wire is `10^(–6) m^(2)` then potential gradient will be

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

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

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

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

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