In a potentiometer circuit there is a cell of e.m.f 2V, a resistance of `5Omega` and a wire of uniform thickness of length 1000cm and resistance `15Omega`. The potential gradient in the wire is

Options

A. `1/500V//cm`
B. `3/2000V//cm`
C. `3/50000V//cm`
D. `1/1000V//cm`

Answer

B