Question: A certain amount of charge q is placed on the plates of a capacitor, and the plates are then disconnected from the outside world.

A certain amount of charge ± q is placed on the plates of a capacitor, and the plates are then disconnected from the outside world. If the capacitor plates are pulled apart, does the amount of electric potential energy stored in the capacitor increase or does it decrease? Explain your answer in terms of the principle of conservation of energy.

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