Question: 1. The voltage across a parallel plate capacitor with plate separation 0.5 mm is 1200 V. The capacitor is disconnected from the voltage source and

1. The voltage across a parallel plate capacitor with plate separation 0.5 mm is 1200 V. The capacitor is disconnected from the voltage source and the separation between the plates is increased until the energy stored in the capacitor has been doubled. Determine the final separation between the plates.

2. If the potential difference of a parallel-plate capacitor is doubled by changing the plate separation without changing the charge, by what factor does its stored electric energy change?

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