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Electrical Machines

Electrical Machines
Example of double excited machine is

 Both are correct.
None of these
 Synchronous motor.
 DC Shunt Motor

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Electrical Machines
In above questions, find the power delivered by each of the alternators to a load of impedance 6Ω(resistive)

 100 W, 2000 W.
  3190 W, 5040 W.
 6000 W, 7000 W.
 1000 W, 5040 W.

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Electrical Machines
In a transformer which of the following losses are zero?

 Rotational loss
 Copper loss
All of these
 Iron loss

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Electrical Machines
Current in a coil undergoing commutation is not able to get reversed completely by the end of commutation period. It is due to

  coil resistance.
None of these
  reactance voltage induced in the coil.
 armature emf.

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Electrical Machines
In auto transformer if the turn ratio is K, what is the power transferred inductively?

None of these
 both A and B
 K × input power
 (1-K) × input power

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Electrical Machines
The dc motor which can provide zero speed regulation at full load without any controller, is

 cumulative compound.
 series.
 shunt.
 differential compound.

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