If specific resistance of a potentiometer wire is 10-7$\Omega $ m and current flow through it is 0.1 amp., cross-sectional area of wire is 10$-$6 m2 then potential gradient will be

Question

If specific resistance of a potentiometer wire is 10^-7$\Omega $ m and current flow through it is 0.1 amp., cross-sectional area of wire is 10^$-$6 m² then potential gradient will be

10^$-$2 volt/m