A. zero
B. 45°
C. 90°
D. 120°
A. Windage loss
B. Bearing friction loss
C. Copper loss
D. Core loss
A. the force required to accelerate the rotor to the synchronous speed in an instant is absent
B. the starting device to accelerate the rotor to near synchronous speed is absent
C. a rotating magnetic field does not have enough poles
D. the rotating magnetic field is produced by only 50 Hz frequency currents
A. one-third
B. twice
C. thrice
D. six times
E. nine times
A. direcly proportional to the synchronous reactance
B. inversely proportional to the synchronous reactance
A. equal to the synchronous reactance
D. none of the above
A. stop
B. run as induction motor
C. function as static condenser
D. burn with dense smoke
A. will refuse to start
B. will overheat in spots
C. will not come upto speed
D. will fail to pull into step