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Armature reaction in a dc machine is __________

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in Electrical Machines by (135k points)
Armature reaction in a dc machine is __________

(a) cross magnetizing in nature

(b) magnetizing in nature

(c) demagnetizing in nature

(d) none of the mentioned

This question was posed to me in exam.

This key question is from MMF and Flux Density Waveforms in DC Machines in division DC Machines of Electrical Machines

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Correct answer is (a) cross magnetizing in nature

Easy explanation: It is cross magnetizing in nature which happens due to interaction between stator and field mmf.

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