____________are used for construction of core of electromagnets?
Correct answer: A. Soft magnetic materials
- A. Soft magnetic materials
- B. Hard magnetic materials
- C. Either A. or B.
- D. None of the above
Explanation
Soft magnetic materials are used for electromagnet cores because they magnetize readily and lose their magnetism when the magnetizing current is removed. Hard magnetic materials retain magnetism and are preferred for permanent magnets.
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