The core of a transformer is laminated to reduce energy losses due to__________?
Correct answer: A. Eddy currents
- A. Eddy currents
- B. Hysteresis
- C. Resistance in winding
- D. None of these
Explanation
An alternating magnetic flux in the iron core induces circulating currents within the core itself. Laminating the core breaks these current paths and increases resistance, thereby reducing eddy-current heating and energy loss. The likely choice is b, because hysteresis is also a core loss but is reduced mainly by using suitable magnetic material, not by lamination.
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About Transformers
Transformers transfer alternating electrical energy between coils by mutual induction, with voltage ratio determined by the turns ratio. The topic covers step-up and step-down transformers, current changes, ideal power conservation and practical losses such as heating and flux leakage. A transformer requires changing magnetic flux, so it does not operate with steady direct current.
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