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To move a unit positive charge from one point to another on a equipotential surface:

To move a unit positive charge from one point to another on a equipotential surface: Correct Answer no work is done on the charge

Concept:

  • Equipotential surface: Any surface with the same electric potential at every point is termed as an equipotential surface.
  • Some properties of the equipotential surface are given below:
    • The electric field is always perpendicular to an equipotential surface.
    • Two equipotential surfaces can never intersect.
    • For a point charge, the equipotential surfaces are concentric spherical shells.
    • For a uniform electric field, the equipotential surfaces are planes normal to the x-axis.
    • The direction of the equipotential surface is from high potential to low potential.

 

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Explanation:

  • Since the potential at each point of an equipotential surface is the same, the potential does not change while we move a unit positive charge from one point to another.
  • Therefore work done in the process is zero.

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