A Parallel Plate Capacitor with Plates of Area a and Plate

question 30

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 the potential difference between the plates?

• A)The final potential difference is 4V.
• B)The final potential difference is 2V.
• C)The final potential difference is 0.5V.
• D)The final potential difference is 0.25V.
• E)The final potential difference is V.

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