A parallel-plate capacitor is connected to a 12 V battery an…
A parallel-plate capacitor is connected to a 12 V battery and is allowed to fully charge until it is storing a certain amount of energy, U. We then remove the 12 V battery and replace it with a 24 V battery. We make one more change to the capacitor so that that it once again stores an amount of energy equal to U. What change might we have made?
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