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The delay of the commutation occurs due base cause of emf induced due to _________

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The delay of the commutation occurs due base cause of emf induced due to _________

(a) self inductance, mutual inductance

(b) self inductance

(c) mutual inductance

(d) leakage inductance

The question was posed to me during an interview for a job.

My doubt stems from Rotating Amplifiers topic in portion DC Generators of Electrical Machines

1 Answer

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Right option is (a) self inductance, mutual inductance

Easiest explanation: The commutation in dc machines is delayed because of the emf induced in the coils and the mutual interaction of the field with neighbour coils.

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