If a unit charge is taken from one point to another over an equipotential surface, then work done on the charge is :

Positive

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Negative

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Zero

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Constant

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Solution

The correct option is C Zero
Equipotential surface has same potential at all points on the surface.
Thus potential difference between two points is zero i.e. $Δ V = 0$
Work done in moving a charge over an equipotential surface $W = q Δ V$
$⟹$ $W = 0$

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If a unit charge is taken from one point to another over an equipotential surface, then work done on the charge is :

The correct option is C ZeroEquipotential surface has same potential at all points on the surface.Thus potential difference between two points is zero i.e. ΔV=0 Work done in moving a charge over an equipotential surface W=qΔV⟹ W=0

The correct option is C Zero
Equipotential surface has same potential at all points on the surface.
Thus potential difference between two points is zero i.e. $Δ V = 0$
Work done in moving a charge over an equipotential surface $W = q Δ V$
$⟹$ $W = 0$