Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysteresis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ?
Correct answer: B. High frequency transformers
- A. Armature of small motors/generators
- B. High frequency transformers
- C. Induction motors
- D. Generators and small motors
Explanation
High-silicon electrical steel, containing roughly 4% silicon, is used for high-frequency transformer cores because it has low hysteresis loss and high magnetic permeability. Ordinary motor and generator components generally use lower silicon contents.
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