A. zero power factor leading
B. unity power factor
C. 0.707 power factor lagging
D. 0.707 power factor leading
A. no-load and greatly over-excited fields
B. no-load and under-excited fields
C. normal load with minimum excitation
D. normal load with zero excitation
A. directly proportional to the square of the applied voltage
B. directly proportional to applied voltage
C. inversely proportional to applied voltage
D. none of the above
A. Universal motor
B. Synchronous motor
C. Induction motor
D. Reluctance motor
A. the synchronous speed
B. less than synchronous speed
C. more than synchronous speed
D. none of the above
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. lower stability limit
B. high stability limit
C. good speed regulation
D. good voltage regulation
E. none of the above