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Maximum power in cylinder rotor alternator occurs at load angle of __________

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Maximum power in cylinder rotor alternator occurs at load angle of __________

(a) 90 degree

(b) 45 degree

(c) less than 90 degree

(d) 180 degree

This question was posed to me at a job interview.

My question is from Power Angle Characteristics of Synchronous Machines topic in chapter Synchronous Machines of Electrical Machines

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Best answer
The correct choice is (a) 90 degree

To explain I would say: The maximum power will occur at exact 90° for a cylindrical rotor alternator.

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