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Electrical Machines

Electrical Machines
At the instant of starting, the per unit slip of 3 - Φ induction motor is

  0.05.
  1.0.
  0.5.
  0.1.

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Electrical Machines
Series generators are used in which of the following applications?

 Used as boosters in dc distribution or transmission.
 Arc welding.
 Air crafts.
All of these

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Electrical Machines
The speed regulation of a DC motor is given as

 NnL − NfL.
 NnL/NfL.
 (NfL − NnL)/NnL.
 (NnL − NfL)/NfL.

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Electrical Machines
Universal motors are used in

 food processing
All of these
 cranes
 traction

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Electrical Machines
The speed of rotating magnetic field of 8 pole 50 Hz induction motor is

 750 rpm
 1000 rpm
 3000 rpm
 1500 rpm

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Electrical Machines
The output power of any electrical motor is taken from the

 Coupling mounted on the shaft.
 Armature.
 Motor frame.
 Field.

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