My text reads for Potential Due to a Collection Charges: 1/(4πє) ∑ q/r I'm consfused about the distance and how it's treated as a scalar. Let's say you want to calculated the potential between two protons. If a proton (or electron) is placed in the middle, there will be no net force and therefore no net electric field. With no electric field, you can have no potential, right? If you use the equation above, you get a potential. Ex) If the field point was 1 meter away from each proton, you would get the same potential as that of a field point 1 meter away from a particle with charge 2e(+).