Air-core coils are practically free from______________?
Correct answer: C. both (A) and (B)
- A. hysteresis losses
- B. eddy current losses
- C. both (A) and (B)
- D. none of the above
Explanation
An air-core coil has no ferromagnetic material, so it has practically no hysteresis loss; its nonmagnetic core also avoids the usual core eddy-current loss. Hence both listed losses are treated as absent in the ideal practical model.
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