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Electrical Machines

Electrical Machines
In dc motors, under leading pole tips flux density will--------?

 increase
 decrease
 either increase or decrease
None of these

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Electrical Machines
A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is the new speed?

 0.
 2000.
 1000.
 500.

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Electrical Machines
In case of DC Shunt Motor, the speed will____ if the voltage increases, neglecting armature saturation.

 be unpredictable.
 remain the same.
 increase
 decrease.

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Electrical Machines
Ratio of starting torque to full load torque is minimum in

  Shunt motor.
  Cumulative compound motor.
  Series motor.
  Differential compound motor.

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Electrical Machines
Which of the following voltage regulator is preferred for providing large values of load current?

  Transistor shunt regulator.
  Zener diode shunt regulator.
  Transistor series regulator.
None of these

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Electrical Machines
A 4-pole generator with 16 coil has a two layer lap winding. The pole pitch is

 32.
 8.
 16.
  4.

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MORE MCQ ON Electrical Machines

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