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The condition for maximum power output for an alternator having its load impedance as (2+j) ohms is?

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The condition for maximum power output for an alternator having its load impedance as (2+j) ohms is?

(a) 26.56°

(b) 63.43°

(c) 90°

(d) 116.56°

I have been asked this question in quiz.

The doubt is from Power Flow Through an Inductive Impedance in chapter Efficiency and Regulation of Electrical Machines

1 Answer

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Correct choice is (a) 26.56°

The explanation is: Maximum power output is arctan(1/2)= 26.56°.

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