ISRO Electrical Engineering (EE) 2013 - Question 26

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Power input to a transformer on no-load at rated voltage comprises predominantly of

  • A. Copper loss
  • B. Hysterisis loss
  • C. Core loss
  • D. Eddy current loss.

Answer: C. Core loss

Explanation: No-load input supplies core (iron) loss; copper loss is negligible.

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