Question: An ideal parallel - plate capacitor consists of a set of two parallel plates of area AA separated by a very small distance dd .

An ideal parallel-plate capacitor consists of a set of two parallel plates of area AA separated by a very small distance dd. When this capacitor is connected to a battery that maintains a constant potential difference between the plates, the energy stored in the capacitor is UU0. If the separation between the plates is doubled, how much energy is stored in the capacitor?
4UU0UU0/22UU0UU0/4UU0

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