A. induction motor torque in field winding B. induction motor torque in damper winding C. eddy current and hysteresis torque in pole faces D. rehetance motor torque due to saliency of the rotor
A. Increase in both armature current and power factor angle B. Increase in back e.m.f. but decrease in armature current C. Increase in both armature current and power factor which is lagging D. Increase in torque angle but decrease in back e.m.f.
A. Decreases with increase in its excitation B. Increases with increase in its excitation C. Remains unaffected with increase in excitation D. Any of the above
A. Speed of the motor is reduced B. Power factor is decreased C. Eb (back e.m.f.) becomes less than v (applied voltage) D. Er (net resultant voltage) in armature is increased
