1. The problem statement, all variables and given/known data A given system has the equipotential surfaces shown in the figure . http://session.masteringphysics.com/problemAsset/1122530/1/Walker.20.39.jpg A)What is the magnitude of the electric field? B)What is the direction of the electric field? (in degrees from the +x axis) C)What is the shortest distance one can move to undergo a change in potential of 1.50 V? 2. Relevant equations E=-V/R 3. The attempt at a solution I found the answer to the Part A: E= -V/R, R=4sin(26.565) E=559 V/M I cannot wrap my head around the answer to Part B, though. I thought it would simply be 180-25.65, but that's wrong. Any help? I also know how to do Part C, so just Part B would be great!