Energy in Capacitors: An ideal parallel-plate capacitor consists of two parallel plates of area A separated by a distance d. This capacitor is connected to a battery that maintains a constant potential difference across the plates. If the separation between the plates is now doubled, the amount of electrical energy stored on the capacitor will
A. double.
B. quadruple.
C. be cut in half.
D. be cut in fourth.
E. not change.
Answer: C
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