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Electrical Machines

Electrical Machines
In a dc machine 72 number of coils are used. Find the number of commutator segments required?

 37
 74
 72
 36

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Electrical Machines
The type of DC generator used for arc welding purpose is a

 shunt generator
 series generator
 cumulatively compounded generator
 differentially compounded generator

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Electrical Machines
We can apply source transformation to voltage source when a resistance is connected to it in

 15 HP.
 14 HP.
  13 HP.
  10 HP.

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

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

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Electrical Machines
Hunting phenomenon is observed in which motor?

 Both A and C.
 Induction motor.
 DC motor.
  Synchronous motor.

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Electrical Machines
The emf induced in the dc generator armature winding is

 AC and DC
 AC
None of these
 DC

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