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The power factor angle and the load angle of a synchronous motor are

  • A.always exactly equal to one another at every load
  • B.always in the ratio of two to one at every load
  • C.the same quantity described in two different ways
  • D.distinct quantities that happen to coincide only by chance

Answer: D

One describes the phase between voltage and current at the terminals and the other the spatial displacement of the two fields. Both appear on the phasor diagram and both change with load, but they are not the same thing.

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