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Electrical Machines

Electrical Machines
In a dc machine 6 pole wave winding is used. The number of parallel paths are?

 1
 4
 2
 6

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Electrical Machines
The power flow of a dc motor, with respect to a DC generator is

  none of these.
  reversed.
  increased.
  modified.

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

 750 rpm
 3000 rpm
 1000 rpm
 1500 rpm

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Electrical Machines
Shunt field of DC generators consists of--------number of turns and ---------- conductors respectively

 less and thin
 less and thick
 large and thick
 large and thin

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Electrical Machines
Which type motors are preferred for lathes?

 Squirrel Cage induction motor.
 DC shunt motors.
 Either A or B.
 Synchronous motor.

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Electrical Machines
An unexcited single phase synchronous motor is

 reluctance motor.
 AC series motor.
 repulsion motor.
  universal motor.

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