The figure shows the equipotential contours due to three point charges. The labels on the contours are in Volts.

Engineering

Physics

Electric Potential Energy and Electric Potential

Question

The electric field at e is directed normal to the 221.7 V contour and away from the 312.1 V contour

–118.1 J of work is done to move a charge of 1 Coulomb from d to c along the contour

Two of charges are positive and one is negative

A charge released from rest on one of these contours will not move along the contour

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EF is directed perpendicular to equipotential surface and from high potential to low potential.
force on a charge is perpendicular to the equipotential.
Becuase we have zero potential not at ∞ so, charge can't be commented.
Work done on an equipotential line is zero.

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