Lecture 5, ACT 2
A positive charge Q is moved from A to B along the path shown. What is the sign of the work done to move the charge from A to B?
Two test charges are brought separately to the vicinity of positive charge Q.
- charge +q is brought to pt A, a distance r from Q.
- charge +2q is brought to pt B, a distance 2r from Q.
- Compare the potential at point A (VA) to that at B (VB):