A. improves the efficiency
B. helps the rotor teeth to remain under the stator teeth
C. helps in reducing the tendency of the rotor teeth to remain under the stator teeth
D. improves the power factor
Related Mcqs:
- The power factor of a single-phase induction motor is usually?
A. lagging
B. always leading
C. unity
D. unity to 0.8 leading - Single phase induction motor usually operates on__________?
A. 0.6 power factor lagging
B. 0.8 power factor lagging
C. 0.8 power factor leading
D. unity power factor - The rotor developed by a single-phase motor at starting is___________?
A. more than i.he rated torque
B. rated torque
C. less than the rated torque
D. zero - In which single-phase motor, the rotor has no teeth or winding ?
A. Split phase motor
B. Reluctance motor
C. Hysteresis motor
D. Universal motor - Locked rotor current of a shaded pole motor is____________?
A. equal to full load current
B. less than full load current
C. slightly more than full load current
D. several times the full load current - In a hysteresis motor, the rotor must have____________?
A. retentivity
B. resistivity
C. susceptibility
D. none of the above - The rotor of a hysteresis motor is made of___________?
A. aluminium
B. cast iron
C. chrome steel
D. copper - After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on ______________?
A. running winding
B. rotor winding
C. field winding
D. compensating winding - Torque developed by a single phase induction motor at starting is_____________?
A. pulsating
B. uniform
C. none of the above
D. nil - If a single phase induction motor runs slower than normal, the most likely defect is_____________?
A. worn bearings
B. short-circuit in the winding
C. open-circuit in the winding
D. none of the above
