Which of the following steps is likely to result in reduction of hysteresis loss in a D.C. generator ?
Correct answer: D. Using material of low hysteresis co-efficient for armature core material
- A. Providing laminations in armature core
- B. Providing laminations in stator
- C. Using non-magnetic material for frame
- D. Using material of low hysteresis co-efficient for armature core material
Explanation
Hysteresis loss depends on the magnetic material and is reduced by using armature-core material with a low hysteresis coefficient. Laminations primarily reduce eddy-current loss rather than hysteresis loss.
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