A. the magnetising current of the rotor will decrease
B. the power factor will decrease
C. speed of motor will increase
D. the windage losses will increase
A. inadequate motor wiring
B. poorely regulated power supply
C. any one of the above
D. none of the above
A. three phase transformers
B. compound generators
C. D.C. series motors
D. induction motors
A. frequency
B. rotor inductive reactance
C. square of supply voltage
D. all of the above
A. low voltage supply
B. high loads
C. harmonics develped in the motor
D. improper design of the machine
E. none of the above
A. pulling the motor directly on line without a starter
B. locking of rotor due to harmonics
C. starting the motor on load which is more than the rated load
D. interchanging two supply phases for quick stopg
A. slip ring induction motor
B. squirrel cage induction motor
C. both A. and (b)
D. none of the above