Capacitor energy U = ½CV². If voltage doubled, energy becomes:

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U ∝ V². If V' = 2V, U' = 4U. Energy scales with square of voltage. Memory aid: 'Capacitor energy: U ∝ V²; double voltage ⇒ quadruple energy'. Electrostatics proportionality frequently tested in competitive exams.

Capacitor energy U = ½CV². If voltage doubled, energy becomes: MCQ with Answer and Explanation

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