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The energy stored in a condenser of capacitance \(C\) raised to a potential \(V\) is given by

1. \(\tfrac{1}{2}CV^2\)
2. \(\tfrac{1}{2}C^2V\)
3. \(CV\)
4. \(\tfrac{1}{2}VC^2\)

Correct answer: \(\tfrac{1}{2}CV^2\)

Solution

The energy stored in a capacitor is \(U=\tfrac{1}{2}CV^2\). This follows from the work done in charging the capacitor.

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