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Electrical Machines

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

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

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Electrical Machines
In a Dc generator the magnetic neutral axis coincide with geometrical neutral axis, when

  the generator runs on designed speed.
  the generator runs on overload.
  the generator runs on full load.
  there is no load on the generator.

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Electrical Machines
Fifth harmonic component of the induced voltage in three phase AC generator can be eliminated by using a winding pitch of

 2 / 3.
 5 / 6.
 6 / 7.
  4 / 5.

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Electrical Machines
A separately-excited dc motor has an armature resistance of 0.5 Ω. It runs off a 250 V dc supply Drawing an armature current of 20 A at 1500 rpm. The torque developed for an armature current Of 10 A, for the same field current, will be

 16.55 Nm
 15.92 Nm
 15.28 Nm
 15.6 Nm

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Electrical Machines
In above question, find rms line voltage for delta connection?

 100 V.
 399 V.
 50 V.
  230.2 V.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The air gap between stator and the rotor of the 3 - φ induction motor is kept

  as small as possible.
  depends on the material of stator and the rotor.
  as wide as possible.
  air gap does not matter.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines

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