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(D) The work done $W$ in moving a charge $q$ from one point to another is given by the formula: $W = q \Delta V$ where $\Delta V$ is the potential dif

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work done to move a charge is zero.

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(D) The work done $W$ in moving a charge $q$ from one point to another is given by the formula: $W = q \Delta V$ where $\Delta V$ is the potential difference between the two points. By definition,an equipotential surface is a surface where the electric potential is the same at every point. Therefore,for any two points on an equipotential surface,the potential difference $\Delta V = 0$. Substituting this into the work formula: $W = q 	imes 0 = 0$ Thus,the work done to move a charge over an equipotential surface is zero.

If a unit charge is taken from one point to another point over an equipotential surface,then

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