Capacitor AS an energy storing device help!? 1. The problem statement, all variables and given/known data An air-filled parallel-plate capacitor has plate area A and plate separation d. The capacitor is connected to a battery that creates a constant voltage V. Question:find the energy U0 stored in the capacitor. Express your answer in terms of A,d ,V , and epsilon_0. 2. Relevant equations 3. The attempt at a solution u = (1/2)epsilon_0E^2 [(1/2)CV^2]/Ad and a few others ><"