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In case of DC machine winding, number of commutator segments is equal to ______

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In case of DC machine winding, number of commutator segments is equal to ______

(a) Number of armature coils

(b) Number of armature coil sides

(c) Number of armature conductors

(d) Number of armature turns

I had been asked this question during an online interview.

This question is from Brushes and Commutator Assembly in section DC Machines of DC Machines

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Best answer
The correct option is (a) Number of armature coils

The best explanation: Armature current is induced in a DC machine, which is fed up to the external circuit. Thus, it needs to be unidirectional. So, for converting bidirectional current to unidirectional commutators which are equal in number of armature coils need to be used.

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