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Electrical Machines

Electrical Machines
Which of the following DC generators has rising V-I characteristics?

  Series.
  None of them.
  Compound.
  Shunt.

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Electrical Machines
In induction motor especially the cage rotors slots are nearly parallel to shaft axis. This is called

  skewing.
  slip.
  cogging.
  crawling.

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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

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

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Electrical Machines
The emf induced in a conductor rotating in a bipolar field is

 AC.
None of these
 both of above.
 DC.

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Electrical Machines
Transformers operating in parallel will share the load depending upon their

 leakage reactance.
 rating.
 efficiency.
 percentage impedance.

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Electrical Machines
From no load to full load the slip will

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

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