Question
A 10 μF capacitor is charged to 100 V. The energy
stored in the capacitor is:Solution
The energy stored in a charged capacitor is given by: U = 1/2 CV² Substitute C = 10μF = 10 × 10-6 F, V = 100V: U = 1/2 × 10-5 × (100)² = 1/2 × 10-5 × 104 = 0.5 J Hence, the energy stored is 0.5 J.
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