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When a salient pole 3-phase synchronous motor is started by induction motor action and its field is connected across a field discharge resistance, starting torque is developed by | |
A. | reluctance torque due to saliency of the rotor, [Wrong Answer] |
B. | eddy current and hysteresis tcrque in pole faces. [Wrong Answer] |
C. | induction motor torque in field and damper windings. [Wrong Answer] |
D. | all of the above. [Correct Answer] |