Which of the following statements is false? Group of answer choices a. The change in potential between two points on an equipotential surface is zero b. The electric field is always perpendicular to equipotential surfaces c. The work done by the field on a charge that moves on an equipotential surface is zero d. The potential energy of a charge does not change if it moves on an equipotential surface e. Positive charges move from low to high potential if acted on only by the electric field.