Transformer cores are normally made from ______________________?
Correct answer: C. Grain oriented Fe-Si alloy
- A. Soft ferrites
- B. High purity iron
- C. Grain oriented Fe-Si alloy
- D. Al-Ni-Co alloy
Explanation
Transformer cores normally use grain-oriented silicon steel because its low hysteresis and eddy-current losses are improved along the preferred grain direction. Al-Ni-Co is used for permanent magnets, not ordinary transformer cores.
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