1. The problem statement, all variables and given/known data When the potential is constant throughout a given region of space, is the electric field in the region also zero? 2. Relevant equations in a parallel plate capacitor, electric filed = - delta V / delta d 3. The attempt at a solution It is difficult to understand how in a given region where the electric potential could be constant. That means at any given location, V=kq/r is the same everywhere and delta v equals zero. I can only relate this to a plate capacitor where the electric field is defined as - delta v / delta d. If delta v is zero, then E=0. Am I on the right track?