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Mmf method of voltage regulation is called _______ while the emf method is __________

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Mmf method of voltage regulation is called _______ while the emf method is __________

(a) optimistic, pessimistic

(b) pessimistic, pessimistic

(c) optimistic, optimistic

(d) pessimistic, optimistic

The question was posed to me during an interview.

This interesting question is from Voltage Regulation of an Alternator topic in division Synchronous Generators of Electrical Machines

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Right choice is (a) optimistic, pessimistic

The explanation: In the mmf method the calculated value is lesser than the actual value so it is less misleading than emf method which predicts a greater value.

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