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Question 20222
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Electromagnetic Induction and Alternating Current: Power Dissipated in Inductor MCQ

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Power Dissipated in InductorEasyQuestion 20222

Question

Average power dissipated in a pure inductor connected to AC supply is:
  1. A
    V_rms × I_rms
  2. B
    V_rms × I_rms/2
  3. C
    V_rms × I_rms / √2
  4. D
    Zero
    Correct

Correct answer

Zero

Explanation

For a pure inductor, phase angle φ = 90° → cos 90° = 0 → average power = V_rms I_rms × 0 = 0. The inductor stores energy for half a cycle and returns it the next — no net energy loss.

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