Parallel-Plate Capacitor: An capacitor consists of two large parallel plates of area A separated by a very small distance d. This capacitor is connected to a battery and charged until its plates carry charges +Q and -Q, and then disconnected from the battery. If the separation between the plates is now doubled, the potential difference between the plates will
A. double.
B. quadruple.
C. be cut in half.
D. be cut in fourth.
E. not change.
Answer: A
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