1. The problem statement, all variables and given/known data Imagine two conductor spheres with radius r1 and r2, so that r1 > r2. The two spheres are connected by a infinitely long wire, and the total charge of the system is Q. What's the ratio of the potential of the first sphere by the potential of the second sphere? 2. Relevant equations 3. The attempt at a solution I solved the problem. However to accomplish that I had to say that the electric potential is equal in both spheres, and that's what I'm having trouble understanding. Why is the electric potential equal in both spheres? Thanks in advance!