A potentiometer wire has resistance `40Omega` and its length is 10m. It is connected by a resistance of `760Omega` in series if emf of battery is 2V then potential gradient is:-

Options

A. 0.5×10−6V/m
B. 1×10−6V/m
C. 1×10−2V/m
D. 2×10−6V/m

Answer

C

Explanation

The object will be have translation motion withour rotaion, when F is applied at CM of the system.

If P is the CM then `m(2l - x) = 2m (x - l) rArr x = (4l)/(3)`