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Electrical Machines

Electrical Machines
A 8 pole, 50 Hz single phase induction motor is running at 690 rpm. Its slip with respect to forward field is

 0.08
 -1.92
 1.92
 -0.08

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Electrical Machines
Iron loss in a transformer mainly occurs in

 winding of transformer.
 iron made tank of transformer.
 transformer insulating oil.
 steel core in transformer.

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Electrical Machines
The power factor of squirrel cage induction motor is

 low at light loads only
 both A and B
 low at heavy loads only
 low at rated load only

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Electrical Machines
In DC generators, the residual magnetism is of the order of

  2.5 %.
 10 %.
  15 %.
  20 %.

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Electrical Machines
In normal dc machines operating at full-load conditions, the most powerful electromagnet is

 interpole winding
 field winding
 armature winding
 interpole and compensating windings together

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Electrical Machines
A 3-phase, 2 pole, 12 slot synchronous machine is operating at synchronous speed. Find the slot angle?

 18°
 20°
 60°
 30°

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MORE MCQ ON Electrical Machines

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