Question

Which of the following methods is likely to result in reduction of hysteresis loss in a DC generator?

(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

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Answer 1

Right option is (d) Using material of low hysteresis co-efficient for armature core material

For explanation: Providing laminations will work for reducing eddy current losses, but hysteresis loss is dependent on the material chosen. Thus, using different material for core of armature will definitely work.