PhysicsCapacitorsWAEC
A 4 μF capacitor is charged to 100 V. How much energy does it store?
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Answer: D. 0.02 J
E = ½CV² = ½ × 4 × 10⁻⁶ × 10⁴ = 0.02 J.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.