Question: An 3 phase alternator star connected 400 V synchronous motor takes a power input of 5472 watts at rated voltage. Its synchronous reactance is 10** per phase and negligible resistance. If its excitation voltage is adjusted equal to the rated voltage of 400 V, its power factor is _______
Options
A : cos(10°)
B : cos(20°)
C : cos(40°)
D : cos(30°)
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