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Question 20218
JEE Physics · Hard

Electromagnetic Induction and Alternating Current: Transformer Efficiency MCQ

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Transformer EfficiencyHardQuestion 20218

Question

A transformer has primary power input 2000 W. Secondary delivers 1800 W. Efficiency is:
  1. A
    80%
  2. B
    90%
    Correct
  3. C
    95%
  4. D
    75%

Correct answer

90%

Explanation

Efficiency η = P_out/P_in × 100 = 1800/2000 × 100 = 90%.

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