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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
The breakdown torque of a synchronous motor varies as

 1/V²
 applied voltage V
 V²
 1/V

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Electrical Machines
DC machine is a

 none of above are correct.
 conduction machine.
 convection machine.
 both are correct.

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Electrical Machines
A 250 V DC generator in run at rated speed with no excitation. The open circuit voltage will be

  zero.
 about 100 V.
  250 V.
  very small, say about 2 or 3 V.

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Electrical Machines
Value of specific electric loading of Induction motor is in the range of

 30000 - 100000 ampere conductor / metre.
  5000 - 45000 ampere conductor / metre.
 40 - 400 ampere conductor / metre.
  400 - 4000 ampere conductor / metre.

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Electrical Machines
Speed of DC motor can be controlled by varying

 resistance of armature culture.
 all of these.
 its flux oer pole.
 applied voltage.

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MORE MCQ ON Electrical Machines

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