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Electrical Machines

Electrical Machines
When flux density is constant in a transformer, hysteresis loss varies as

 f
 f²
 V
 V²

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Electrical Machines
A DC generator beyond critical resistance will generate

 maximum current.
 no voltage.
 maximum power.
 maximum voltage.

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Electrical Machines
Maximum power developed in a cylindrical synchronous machine depends on

 both 1and 2
 excitation
 synchronous reactance
 load angle

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Electrical Machines
At stand still condition the value of slip is

 finite value
 infinite value
 0
 1

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Electrical Machines
The slip of an induction motor normally does not depend on which of the following?

 Shaft torque.
 Synchronous speed.
  Core loss component.
 Rotor speed.

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Electrical Machines
Which of following winding is connected in series with armature winding of DC machine?

 Auxiliary winding.
 Both Compensating and Commutating pole winding.
 Commutating pole winding.
 Compensating winding.

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MORE MCQ ON Electrical Machines

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