1. The problem statement, all variables and given/known data Charge Q is located at the (x,y) origin. q is a distance r in the +x direction from Q. 2q is a distance 2r in the +x direction from Q. Which of q or 2q is at a higher potential? q, 2q, or same. 3. The attempt at a solution I am thinking that it would depend on Q. Q=0, then the higher potential is at q. But if it wasn't =0? The fact that 2q and q impact each other's potential also makes this problem difficult. Any thoughts?