Variation in potential is maximum if one goes.

Options

A. along the line of force.
B. Perpendicular to the line of force.
C. in any direction.
D. none of these.

Answer

a

Explanation

`d V = - E dr cos theta`
Along the line of force, `theta` is `0^(@)`, hence `d V` is maximum. So the variation of potential is maximum along the line of force.