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Electrical Machines

Electrical Machines
In alternator, the rotary part is

  magnetic field poles.
 armature.
 core.
 none of these.

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Electrical Machines
The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is

  3600 rpm.
  3000 rpm.
  1500 rpm.
  4000 rpm.

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Electrical Machines
A flat compound generator is obtained from compound generator by connecting a variable resistor

 in series with the shunt field
 in parallel with the series field
 in parallel with the shunt field
 in series with the series field

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Electrical Machines
A 4-pole generator with 16 coil has a two layer lap winding. The pole pitch is

 16.
 32.
  4.
 8.

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Electrical Machines
A generator may loose residual magnetism due to

  any of these.
  vibrations.
  heating.
  over excitation.

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Electrical Machines
For the same power output rating and full load speed, the motor will have poorest starting torque, is

  Shunt.
 Series.
 Cummulative compound.
 Differential compound.

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MORE MCQ ON Electrical Machines

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