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 materialI have been asked this question during an interview for a job.I would like to ask this question from Efficiency of DC Machine- 1 topic in portion Efficiency and Testing of DC Machines

Which of the following methods is likely to result in reduction of hys

1.	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 materialI have been asked this question during an interview for a job.I would like to ask this question from Efficiency of DC Machine- 1 topic in portion Efficiency and Testing of DC Machines
Answer» 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.

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