The electric energy stored in a capacitor can be written in three ways, as QV/2,

Question

The electric energy stored in a capacitor can be written in three ways, as QV/2, as CV2/2, or as Q2/(2C). In one equation the capacitance (C) is in the numerator and in one equation the capacitance is in the denominator. So what will happen to the energy if the capacitance were to increase?

Question options:

It will always increase.

It will always decrease.

It will not change since one equation for energy doesn't have the capacitance in the equation.

It will depend on what happens to the voltage and charge on the capacitor.

It will always increase.

It will always decrease.

It will not change since one equation for energy doesn't have the capacitance in the equation.

It will depend on what happens to the voltage and charge on the capacitor.

Explanation / Answer

Q = CV

C = Q/V

HERE CAPACITANCE DEPENDS ON THE CHARGE AND VOLTAGE

SO ENERGY ALSO DEPENDS ON THE CHARGE AND VOLTAGE.

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