Which of the following statements is physically possible? At a particular point in space the electric field vector crosses an equipotential surface at a 20 degree angle measured relative to the surface. You measure the voltage at different locations on the metal case ot a desktop PC an find that it is the same value everywhere on the case. The electric Held points in the direction away from a 10V equipotential surface ant directly towards the adjacent 15V equipotential surface. The potential energy of an electron is found to decrease when it moves from point where the voltage is 100V to point B where the voltage is 70V. None of the above statements are possible. Solution A is possible since the electric field vector is independent of the equipotential surface..