The potential at a point distant x (measured in `mum` ) due to some charges situated on the x-axis is given by `V (x)=(20)/(x^(2)-4)` V. The electric field at `x=4 mum` is given by

Options

A. `5/3 v/(mu m)` and in positive `x` direction
B. `10/9 v/(mu m)` and in negative `x` direction
C. `10/9 v/(mu m)` and in positive `x` direction
D. `5/3 v/(mu m)` and in negative `x` direction

Answer

C