A parallel-plate capacitor of capacitance C0 = ε0A0/d0 , is connected to a battery. When the capacitor is fully charged, it is disconnected from the battery (initial state). We push the plates closer together, until d = d0/2 (final state). a) How does the energy stored in the capacitor change (increase or decrease)? Justify your answer. b) Calculate Ufinal / Uinitial , in terms of the parameters defined in the problem.
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A parallel-plate capacitor of capacitance C0 = ε0A0/d0 , is connected to a battery. When the capacitor is fully charged, it is disconnected from the battery (initial state). We push the plates closer together, until d = d0/2 (final state).
a) How does the energy stored in the capacitor change (increase or decrease)? Justify your answer.
b) Calculate Ufinal / Uinitial , in terms of the parameters defined in the problem.
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