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Question 20207
JEE Physics · Hard

Electromagnetic Induction and Alternating Current: Energy in LC Circuit MCQ

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Energy in LC CircuitHardQuestion 20207

Question

In an ideal LC circuit, at any instant the sum of electric and magnetic energy is:
  1. A
    Increasing
  2. B
    Decreasing
  3. C
    Constant
    Correct
  4. D
    Zero

Correct answer

Constant

Explanation

Total energy = ½CV² + ½LI² = constant = Q₀²/(2C) (initial charge energy). Energy oscillates between capacitor and inductor but total is conserved in the ideal lossless case.

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