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Electrical Machines

Electrical Machines
If input of a transformer is square wave the output will be

  pulsed wave.
 sine wave.
 triangular wave.
 square wave.

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Electrical Machines
A triangular mmf wave is produced in the air gap of an electric machine. Such wave is produced by

 rotor of an synchronous machine.
 stator of a dc machine.
 rotor of a dc machine.
 stator of a induction machine.

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Electrical Machines
A 2 KVA transformer has iron loss of 150 W and full load copper loss of 250 W. The maximum efficiency of the transformer would occur when the total loss is

 300 W
 400W
 250 W
 500 W

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Electrical Machines
At the instant of starting, the per unit slip of 3 - Φ induction motor is

  0.1.
  0.5.
  0.05.
  1.0.

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Electrical Machines
Which of the following DC motors has got maximum relieving property?

 Cummulative compound.
  Series.
 Differentical compound.
 Shunt.

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Electrical Machines
The output indicate on the name plate of any motor is always the

 Power drawn in KW.
 Gross power.
  Output power at the shaft.
 Power drawn in KVA.

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MORE MCQ ON Electrical Machines

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