ELECTRICAL MACHINES QUIZ

 rotating with respect to field poles.

  stationary with respect to armature.

  rotating with respect to field poles as well as armature.

  stationary with respect to field poles.

 armature flux

 armature current

All of these

 armature mmf

 Back emf is equal.

 back emf is equal to applied voltage.

  Back emf is equal to half of applied voltage.

 None of above.

 230 V

 460 V

 115 V

 200 V

 80W

 100W

 60W

 40W

 (E2 - V2) / V2

 (V2 - E2) / V2

 (V2 - E2) / E2

 (E2 - V2) / E2

 under leading pole tip.

 under the interpole.

 pole core.

 under trailing pole tip.

 increase in speed but armature currnet remains the same.

 decrease in speed but armature current remains the same.

 decrease in speed demanding less armature current.

 increase in speed demanding more armature current.

 70° to 85°

 25° to 30°

 90°

 0°

 As a separate unit.

 In parallel with the armature winding.

 In parallel with the field winding.

  In series with the armature winding.