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Electrical Machines

Electrical Machines
From no load to full load the slip will

 not change.
None of these
 slightly increase.
 slightly decrease.

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Electrical Machines
Unbalance 3 - Φ stator currents cause

  double frequency currents in the rotor.
  vibrations.
  heating of rotor.
All of these

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Electrical Machines
A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is

 340 A.
 570 A.
 440 A.
 250 A.

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Electrical Machines
A DC compound motor has

 tertiary winding.
 both shunt and series field winding.
 only series field winding.
 only shunt field winding.

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Electrical Machines
The power developed by salient pole synchronous machine is/are

None of these
 both 1 and 2
 power due to saliency or reluctance only
 excitation power only

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Electrical Machines
A 220 V DC generator is run at full speed without any excitation. The open circuit voltage will be

  about 2 V.
  about 50 V.
  zero.
  220 V.

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MORE MCQ ON Electrical Machines

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