1. The problem statement, all variables and given/known data Plate capacitor is filled with two dielectrics of constants 3 and 4, and with a metal as seen in the picture. If the el. field in the first dielectric is 30 kV/cm, do: a) diagram of el. potential difference with calculated characteristic values using point C as a reference point. b) voltage UBF 2. The attempt at a solution There's no way φd can be 0 and I don't know any other way of getting to it.