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In the figure below, the point ‘F’ corresponds to _______ which can be obtained by ________

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In the figure below, the point ‘F’ corresponds to _______ which can be obtained by ________

(a) field current required to circulate short circuit current, SCC

(b) field current required to circulate full load current, SCC

(c) mmf required to cancel the hysteresis losses, SCC

(d) mmf required to compensate the leakage reactances, SCC

I have been asked this question in an international level competition.

My query is from Synchronous Motor Phasor Diagram in chapter Synchronous Motors of Electrical Machines

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The correct answer is (a) field current required to circulate short circuit current, SCC

The explanation is: Point ‘F’ corresponds to the short circuit current and it is obtained by SCC plot.

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