Change of D.C. excitation of a synchronous motor changes:
Correct answer: B. power factor of power drawn by the motor
- A. applied voltage of the motor
- B. power factor of power drawn by the motor
- C. motor speed
- D. none of the these
- E. all of the these
Explanation
Changing DC field excitation changes the reactive current drawn by the motor and therefore its power factor. It does not change the applied voltage or synchronous speed.
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