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Which of the following losses in a transformer is zero even at full load?

Correct answer: D. D: Friction loss

  • A. A: Eddy current loss
  • B. B: Core loss
  • C. C: Copper loss
  • D. D: Friction loss

Explanation

The correct answer is D: Friction loss. Transformers are static devices and do not have moving parts; therefore, they do not experience friction losses under any circumstances. Option A (Eddy current loss) and Option B (Core loss) are incorrect because they are inherent to the operation of transformers due to magnetic fields and do not disappear at full load. Option C (Copper loss) is incorrect as it is dependent on the electrical current flowing through the windings and varies with load, hence it is not zero at full load.

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