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The post effects of the armature reaction is _________

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The post effects of the armature reaction is _________

(a) main field distortion

(b) shift in MNA

(c) reduction in main field

(d) none of the mentioned

The question was asked in final exam.

Query is from DC Motor Starting in chapter DC Motors of Electrical Machines

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The correct option is (d) none of the mentioned

The best I can explain: There is no such post effect of armature reaction. The armature reaction phenomena affect the working condition only.

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