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Electrical Machines

Electrical Machines
Stepper motor is used in

All of these
 traction
 computer printers
 food processing

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Electrical Machines
Considering a galvanometer is connected to the rotor of a 3 - Φ, 4 pole, 50 Hz IM and is making 130 oscillations in a minute, then calculate the rotor speed?

 1440.
 1450.
 1500.
  1435.

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Electrical Machines
In DC generators, the residual magnetism is of the order of

  2.5 %.
 10 %.
  20 %.
  15 %.

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Electrical Machines
In circle diagram for induction motor, diameter of circle represents which of the following ?

 Line voltage.
 Running torque.
 Rotor current.
 Slip.

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Electrical Machines
Which of the following DC generators has rising V-I characteristics?

  Compound.
  Series.
  None of them.
  Shunt.

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Electrical Machines
Which of the following motor is more expensive for same KW output rating ?

 Induction motor.
 DC Shunt Motor
 Synchronous motor.
 AC single phase motor.

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