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Electrical Machines

Electrical Machines
To eliminate 5th harmonic in the induced voltage phase breadth should be

 18°
 72°
 36°
 30°

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Electrical Machines
The DC compound motors are generally

 Level Compound.
 Cummulative compound.
 None of these.
 Differentical compound.

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Electrical Machines
The power input to a 3 - φ induction motor is 60 kW and stator loss is 1 kW the rotor cu loss per phase is

 1.
  slip X 69 / 3.
  slip X 59 / 3.
  slip X 50 / 3.

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Electrical Machines
Hunting in a synchronous cannot be due to

  variable supply voltage.
  variable load.
  variable frequency.
  windage friction.

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Electrical Machines
In shaded pole induction motors, the flux moves from ------------- region to ----------------- region respectively?

 unshaded, unshaded
 shaded, unshaded
 shaded, shaded
 unshaded, shaded

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Electrical Machines
In a transformer, the frequency of a voltage at the secondary is

 equal to primary.
 less than primary.
 any of the above.
 greater than the primary.

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MORE MCQ ON Electrical Machines

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