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Electrical Machines

Electrical Machines
In DC machine torque depends on which of the following?

 both A and B
 armature current (I)
 flux (φ)
 speed

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

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

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Electrical Machines
In double cage induction motor, the inner cage offers

  high resistance and low reactance.
  low resistance and high reactance.
  high resistance and high reactance.
  low resistance and low reactance.

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Electrical Machines
Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator?

 Commutator.
 Equalizer rings.
 Eye bolt.
 Dummy coils.

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

 maximum flux density
 both 2 and 3
 supply frequency
 load current

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Electrical Machines
For very sensitive and wide speed control, the preferable control method is

 Field control.
 Multiple voltage control.
 Ward-Leonard control.
 Armature control.

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MORE MCQ ON Electrical Machines

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