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Electrical Machines

Electrical Machines
What will be the maximum power factor of an induction motor for dispersion coefficient of 0.05?

  0.905.
 20.
 1.1.
  0.05.

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Electrical Machines
A 3 - φ induction motor can also be referred to as a

  transformer.
  repulsion motor.
  asynchronous motor.
  shunt motor.

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Electrical Machines
A generator may loose residual magnetism due to

  any of these.
  vibrations.
  over excitation.
  heating.

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Electrical Machines
In a single phase induction motor, the starting torque developed is proportional to

 supply voltage V
 V²
 1/V
 1/V²

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Electrical Machines
Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will

 Decrease.d
 increase.
 none of these.
 remains same.

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

 excitation
 synchronous reactance
 load angle
 both 1and 2

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