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Electrical Machines

Electrical Machines
Swinburne test is conducted under which of the following condition?

 full load
 any of the above
 no load
 half load

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Electrical Machines
When pure inductive load is connected to the alternator, what is the effect of armature reaction?

None of these
 Magnetization
 Demagnetization
 Cross magnetization

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Electrical Machines
Speed of DC motor can be controlled by varying

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

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Electrical Machines
In which of the following, voltage regulation may be zero or negative

All of these
 unity power factor
 leading power factor
 lagging power factor

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Electrical Machines
The principle of operation of a 3 - Φ induction motor is almost similar to that of

  repulsion start induction motor.
  synchronous motor.
  capacitor start induction motor.
  transformer with secondary short circuited.

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Electrical Machines
The rotor winding for a 3-phase slip-ring induction motor having delta-connected stator must be connected in

  delta or star according to need.
  star.
None of these
  delta.

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