Question

Why is an equipotential surface normal to the electric lines of force?

Answer 1

BONJOUR—

Equipotential surface normal to the electric lines of force. This is because,when the potential becomes constant,the negative potential gradient also becomes zero,hence necessitating the need for Electric field to be always normal with surface.

Answer 2

1. Answer:  Explanation: If they weren’t normal it would imply that a component of electric field would be along the equipotential surface. That would further imply that the potential along the surface would change as ΔV= -∫E.dr