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Electrical Machines

Electrical Machines
Compensating winding is placed in the

 main field
 pole shoe
 armature core
All of these

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Electrical Machines
Which of the following induction motor has the highest starting torque?

 Same in both induction motors.
None of these
 Squirrel cage induction motor.
 Slip ring induction motor.

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Electrical Machines
In a transformer, hysteresis and eddy current losses depend upon

 load current
 both 2 and 3
 maximum flux density
 supply frequency

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Electrical Machines
The armature of DC machine is made of silicon steel lamination to

 reduce hysteresis loss only.
 reduce eddy current loss only.
 reduce both eddy current and hysteresis loss.
 increase the permeability.

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Electrical Machines
Stability of a synchronous motor ---------- with the increase in excitation.

 decreases
 remains unaffected
 any of the above
 increases

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Electrical Machines
What will be the eddy current loss if the supply frequency of a transformer becomes double?

 Four times.
 Eight times.
 Doubled.
 Remains same.

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MORE MCQ ON Electrical Machines

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