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(B) When a capacitor of capacitance $C$ is charged to a potential $V$ by giving it a charge $q$,the work done in the process is stored as energy.The p

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Potential energy

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(B) When a capacitor of capacitance $C$ is charged to a potential $V$ by giving it a charge $q$,the work done in the process is stored as energy.The potential $V$ is given by $V = \frac{q}{C}$.The work done $dW$ to bring an additional charge $dq$ is $dW = V dq = \frac{q}{C} dq$.Integrating this from $0$ to $Q$,the total energy $U$ stored is $U = \int_{0}^{Q} \frac{q}{C} dq = \frac{1}{2} \frac{Q^2}{C} = \frac{1}{2} CV^2$.This energy is stored in the form of electrostatic potential energy within the electric field between the plates of the capacitor.

The energy stored in a capacitor is in the form of

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