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In a calculation, the actual voltage regulation is 33.1% while the calculated value of the voltage regulation is 25%. This infers that the chosen method has been ___________

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In a calculation, the actual voltage regulation is 33.1% while the calculated value of the voltage regulation is 25%. This infers that the chosen method has been ___________

(a) emf

(b) mmf

(c) asa

(d) zpf

This question was posed to me in an online interview.

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

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Best answer
The correct answer is (b) mmf

Best explanation: As the given value is less than actual, so it must be mmf method.

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