Question: A parallel - plate capacitor has fixed charges + Q + Q and Q Q . The separation of the plates is then halved.By what

A parallel-plate capacitor has fixed charges +Q+Q and QQ. The separation of the plates is then halved.By what factor does the energy stored in the electric field change?
How much work must be done to decrease the separation of the plates from dd to 12d12d? The area of each plate is AA.

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