A) increase
B) decrease
C) zero
D) infinity
Correct Answer: C
Solution :
The equipotential surfaces in an electric field have the same basic idea as topographic maps used by civil engineers or mountain climbers. An equipotential surface is a three dimensional surface on which the electric potential V is same at every point on it. When a test charge \[{{q}_{o}}\]is moved along the equipotential surface, it follows that \[\vec{E}\]must be perpendicular to the surface at every point, so that the electric force \[{{q}_{o}}\,\vec{E}\]will always be perpendicular to the displacement of a charge moving on the surface, so work done by the electric force is zero.
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