1. The problem statement, all variables and given/known data Given the E field E = 18/R2 R, R is the radial direction. Find the electric potential between A and B where A is at +2m and B at -4m, both on the z axis. 3. The attempt at a solution My question is, since E field depends only on R, the distance between the point and the origin, then E field is the same for point B at -4m and point C at +4m. Therefore they are equipotential. Therefore I can compute the potential difference between A at +2m and C at +4m. Is this reasoning correct?