A 13.5?F capacitor is connected to a power supply that keeps a constant potential difference of 26.0V across the plates. A piece of material having a dielectric constant of 3.45 is placed between the plates, completely filling the space between them.
Part A How much energy is stored in the capacitor before the dielectric is inserted?
Part B How much energy is stored in the capacitor after the dielectric is inserted?
Part C By how much did the energy change during the insertion?
Part D Did it increase or decrease?