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Electrical Machines

Electrical Machines
The output power of any electrical motor is taken from the

 Armature.
 Field.
 Coupling mounted on the shaft.
 Motor frame.

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Electrical Machines
In applied voltage is reduced in a dc shunt motor

 None of these.
  Full load current.
 Full load speed.
 Full load torque.

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Electrical Machines
Air core transformer as compared to iron core transformer, has

 less magnetic core loss.
  no magnetic core loss.
  more copper loss.
 more magnetic core loss.

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Electrical Machines
Scott connections are used for

 three phase to single phase transformation.
 single phase to three phase transformation.
 any of the above.
 three phase to two phase transformation.

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Electrical Machines
Which of the following DC Motor uses 4-point starter?

 DC shunt motor with field weaking control.
 DC series motor.
 DC compound motor.
 DC shunt motor with armature resistance.

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Electrical Machines
The armature resistance of the dc motor is generally of the range

 50 ohm.
  0.5 ohm.
  0.1 ohm.
 100 ohm.

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MORE MCQ ON Electrical Machines

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