A capacitor consisting of two parallel plates, separated by a distance d is init

Question

A capacitor consisting of two parallel plates, separated by a distance d is initially charged to a voltage of 7.9 V. The battery is then disconnected from the capacitor. For each statement below, select True or False.

If the battery is disconnected, and then the distance d between the plates is increased, the amount of charge stored on either plate of the capacitor will change.

If the battery is disconnected, and then the distance d between the plates is increased, the voltage across the capacitor will decrease.

Increasing the distance d after disconnecting the battery will decrease the electrical energy stored in the capacitor.

Explanation / Answer

C= Ax/d = Q/V

U=1/2 x C x V2

First one is false because after disconnection charge is not dependent on the seperation d between the capacitor plates.

Second is false because the voltage is directly proportional to the seperation d.

Third is also false because as d increases, the voltage also increases and the electrical energy stored also increases.

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