Equipotentials are lines along which
A) the electric field is constant in magnitude and direction.
B) the electric charge is constant in magnitude and direction.
C) maximum work against electrical forces is required to move a charge at constant speed.
D) a charge may be moved at constant speed without work against electrical forces.
E) charges move by themselves.

Question

Quizplus · Accepted Answer

Equipotentials are lines or surfaces in which the electric potential is constant. Therefore, if a charge is moved along an equipotential, it does not experience a change in electric potential energy, which means no work needs to be done against electrical forces. Thus, the charge can be moved at a constant speed without any work being done. Therefore, option D is the correct choice.

Equipotentials Are Lines Along Which