Right, initially I thought there was no field because I calculated it to equal zero. Then I realized that the potential is relative and can have whatever value. This material is best understood if you graph the potentials for the two cases.
Ok, I think I figured it out. See if you can follow my logic.
First of all, the potential is whatever you define it to be because you can add a constant.
For the proton in the middle of two other protons, its potential is the same as a proton the same distance away from a particle of...
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...