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By changing the polarity of the armature of failed self-exciting machine, machine can be started.

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By changing the polarity of the armature of failed self-exciting machine, machine can be started.

(a) True

(b) False

I got this question in a national level competition.

The query is from Characteristics of Self Excited Generator topic in division DC Generator of DC Machines

1 Answer

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The correct answer is (a) True

Explanation: By changing the polarity of field connections to the armature negative feedback can be turned into positive feedback, thus it will help to build up the voltage and machine will act good in self-excitation mode.

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