ELECTRICAL MACHINES QUIZ

 0.

 2000.

 500.

 1000.

 Has its field winding consinting of thick wire and less no of turns.

 Has a poor torque.

 Can be started easily without load.

 Has a almost constant speed.

  under commutation.

 over commutation.

  too rapid reversal of current.

  any of the above.

 Stator core loss

All of these

 Stator copper loss

 Rotational loss

 motor will become slow.

 motor will attain dangerously high speed

 armature will oscillate about original speed as the mean speed

 armature current will drop

  0.08 pu.

 0.01 pu.

  0.02 pu.

 0.16 pu.

 S

 1-S

 1/(1-S)

 1/S

 high current and low voltage

 low current and high voltage

 high current and high voltage

 low current and low voltage

 PZL/ 4Sa

 PZL/4S

 PZL/4Sp²

 PZL/4Sa²

 copper loss at full load.

  copper loss at any load.

 copper loss at half load.

 copper loss at over load.