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Electrical Machines

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

 1/V²
 supply voltage V
 V²
 1/V

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

 excitation
 synchronous reactance
 both 1and 2
 load angle

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Electrical Machines
If the field winding connection of DC shunt motor is changed

 motor will become slow.
 motor will not run.
 It will run in same direction.
  It will run in opposite direction.

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Electrical Machines
Silicon content in steel lamination is kept within 5% as it

 makes the material brittle.
All of these
 Increases cost.
 increases hysteresis loss.

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Electrical Machines
Type of single phase motor having highest power factor at full load is

  split phase.
  capacitor start.
  capacitor run.
  shaded pole type.

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Electrical Machines
Which of the following machines have highest power factor with respect to magnetizing current?

 Semi closed slot type machine.
 Closed slot type machines.
 Open slot type machines.
 Any of the above.

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MORE MCQ ON Electrical Machines

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