A Parallel Plate Capacitor with Plates of Area a and Plate

question 25

Multiple Choice

A parallel plate capacitor with plates of area A and plate separation d is charged so that the potential difference between its plates is V. If the capacitor is then isolated and its plate separation is decreased to d/2, what happens to its capacitance?

• A)The capacitance is twice its original value.
• B)The capacitance is four times its original value.
• C)The capacitance is eight times its original value.
• D)The capacitance is one half of its original value.
• E)The capacitance is unchanged.

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