Equipotential Surfaces
Electric field lines intersect equipotential surfaces at:
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About This Question
- Subject
- physics
- Chapter
- electrostatics
- Topic
- equipotential surfaces
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Normal
An equipotential surface is a surface where every point has the same electric potential.
- Work done W=qΔV. If ΔV=0 along the surface, W=0.
- Since W=F⋅ds=q(E⋅ds), for W=0, the electric field E must be perpendicular to the displacement ds along the surface.
- Thus, E is always normal (perpendicular) to equipotential surfaces.
This medium difficulty physics question is from the chapter electrostatics, covering the topic of equipotential surfaces. It appeared in the 2025 exam.
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