Part AWhat is the energy now stored if the capacitor was disconnected from the potential source before the separation of the plates was changed?U=_____JPart BWhat is the energy now stored if the capacitor remained connected to the potential source while the separation of the plates was changed?U=____J

A parallel-plate vacuum capacitor has 7.50 J of energy stored in it. The separation between the plates is 4.00 mm . If the separation is decreased to 1.60 mm