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.Management Sciences
A. varying field flux with tapped field windings
B. connecting rheostat in series
C. applying variable voltage by means of silicon controlled rectifier
D. applying variable voltage by means of variable auto-transformer
E. all of the above methods
Related Mcqs:
- In capacitor start single-phase motors____________?
- A. current in the starting winding leads the voltage B. current in the starting winding lags the voltage C. current in the starting winding is in phase with voltage in running winding D. none of the above...
- A hysteresis motor works on the principle of__________?
- A. hysteresis loss B. magnetisation of rotor C. eddy current loss D. electromagnetic induction...
- The repulsion-start induction-run motor is used because of___________?
- A. good power factor B. high efficiency C. minimum cost D. high starting torque...
- 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...
- Which of the following motors is used in a situation where load increases with speed ?
- A. Induction motor B. Three-phase series motor C. Schrage motor D. Hysteresis motor...
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