alleryAt any point the electric field meets the equipotential surface:
AAt right angles
BAlong the surface
CAt 45 degrees
DAt a random angle
Answer & Solution
Correct answer: A. At right angles
1. Moving along the surface needs no work.
2. So the field has no component along the surface.
3. It must be normal to the surface.
_Source: syllabus Physics Part I, Chapter 2, Electrostatic Potential and Capacitance._
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