Materials subjected to rapid reversal of magnetism should have______________?
Correct answer: B. high permeability and low hysteresis loss
- A. large area oiB-H loop
- B. high permeability and low hysteresis loss
- C. high co-ercivity and high retentivity
- D. high co-ercivity and low density
Explanation
Rapidly reversing magnetic materials should magnetise easily and waste little energy, requiring high permeability and a narrow B-H loop with low hysteresis loss. High coercivity and high retentivity are desirable for permanent magnets, not rapidly alternating applications.
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