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    Question

    A 10 μF capacitor is charged to 100 V. The energy

    stored in the capacitor is:
    A 0.1 J Correct Answer Incorrect Answer
    B 0.05 J Correct Answer Incorrect Answer
    C 1.0 J Correct Answer Incorrect Answer
    D 0.5 J Correct Answer Incorrect Answer

    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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