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Question 31525
JEE Physics · Easy

Capacitance: Energy Formula MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Energy FormulaEasyQuestion 31525

Question

Which of the following expressions for energy stored in a capacitor is NOT correct?
  1. A
    ½CV²
  2. B
    Q²/(2C)
  3. C
    ½QV
  4. D
    QC/V
    Correct

Correct answer

QC/V

Explanation

QC/V = Q·C/V = Q·(Q/V)/V = Q²/V² which has wrong dimensions. The correct forms are ½CV², Q²/2C, ½QV.

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