What happens to the energy stored in a capacitor when a dielectric is introduced and the capacitor i...........

Physics (CUET) Electrostatics

What happens to the energy stored in a capacitor when a dielectric is introduced and the capacitor is disconnected from a battery?

Energy decreases

Energy remains the same

Energy increases

Energy is zero

When a dielectric is introduced, capacitance increases, but the charge remains constant (since disconnected).

Energy stored, given by the formula U = Q²/2C, thus decreases.

This occurs because energy is inversely proportional to capacitance when charge is constant.

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