why electric field lines are always perpendicular to equipotential surfaces?

Asked by  | 7th Jul, 2008, 10:52: AM

Expert Answer:

this is because there is no potential gradient along any direction parallel to  the surface , and so no electric field parallel to the surface. This means that the electric lines of force are always at right angle to the equipotential surface.

Answered by  | 8th Jul, 2008, 11:23: AM

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