A capacitor is connected to a battery. The force of attraction between the plates when the separation between them is halved
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A capacitor is connected to a battery. The force of attraction between the plates when the separation between them is halved

G1 Physics · Accepted Answer

Use Q = CV, U = ½CV² and C = εA/d; reduce the capacitor network by series/parallel combination and apply charge conservation where a node is isolated. The result matches C (becomes four times).