1. The problem statement, all variables and given/known data If the electric field does positive work on a negative charge as the charge undergoes a displacement from point A to point B within an electric field, then the electric potential energy is a) negative b) positive c) increases d) decreases e) electric fields can not do work. The "Right" answer is D, but I do not understand why that is right. I picked C to be the answer. 2. Relevant equations Conceptual question. No equations needed. 3. The attempt at a solution Say I have two points A B I move that negative charge from A to B. If there is positive work done on it during its displacement the electric force will be directed from point A to B. Since the force is done on a negative charge, the electric field is going from point B to point A. Point B is at a higher potential than A. Thus, if the negative charge moves closer to point B which is at a higher potential, then its electric potential energy increases. Right? Thanks in advance for the help in helping me figure out what is the right answer. C or D.