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Electrical Machines

Electrical Machines
At stand still condition the value of slip is

 1
 0
 infinite value
 finite value

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Electrical Machines
In DC generator, the electricity produced in armature is

  AC.
None of these
  DC.
  armature is not present in DC generator.

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Electrical Machines
In shunt dc motor the direction of rotation of the motor will reversed. When

  none of above.
  only armature terminals are reversed.
  either field terminals are reversed or armature terminals are reversed.
  only field terminals are changed.

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Electrical Machines
What is the function of inter pole in DC generator?

 To get a superior commutation.
  Both option B and C.
 To neutralize the distortion of main field flux due to armature reaction.
 To serve the economical aspects.

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Electrical Machines
The emf induced in the dc generator armature winding is

 AC and DC
 DC
None of these
 AC

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Electrical Machines
The armature shaft must be able to withstand

 twisting strains due to transmission of torque.
 any unbalanced magnetic pull on the armature core.
All of these
 bending moment due to weight of the armature.

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