1. The problem statement, all variables and given/known data The question asks: Where is the electric potential 0? 2. Relevant equations I believe the relevant equations are v=1/(4*pi*epsilon) (Q/r) or v=-Ed 3. The attempt at a solution I think that the electric potential is 0 when the electric field is zero as well. However, im not quite sure which equations to look at exactly or if an equation is necessary. Some answers state that the electric potential is zero when it is near the smaller charge or it is zero when the point is at infinity.