A parallel plate capacitor with adjustible plate separation d and adjustible are

Question

A parallel plate capacitor with adjustible plate separation d and adjustible area A is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V Volts. (C is the capacitance and U is the stored energy.) Give all correct answers concerning a parallel-plate capacitor charged by a battery (e.g. B, AC, CDF).

A) After being disconnected from the battery, increasing the area A will increase C.
B) With the capacitor connected to the battery, increasing the area A will decrease Q.
C) With the capacitor connected to the battery, decreasing d increases C.
D) After being disconnected from the battery, increasing the area A will increase U.
E) With the capacitor connected to the battery, decreasing d increases U.
F) With the capacitor connected to the battery, increasing d decreases Q.

Explanation / Answer

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