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Electrical Machines

Electrical Machines
A 4-pole generator with 16 coil has a two layer lap winding. The pole pitch is

 32.
 16.
  4.
 8.

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Electrical Machines
The power factor of an induction motor operating at no load will have a value around

 0.9 lag
 unity
 0.2 lag
 0.2 lead

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Electrical Machines
Synchronising power of a synchronous motor varies

 inversely as 1/Xs
 directly as synchronous reactances Xs
 directly as Xs2
All of these

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Electrical Machines
Which of the DC Motor use flywheel?

 Series motor.
 Cumulatively compound motor.
 Shunt motor.
 Differently compared motor.

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Electrical Machines
Neglecting all losses, the developed torque (T) of DC separately excited motor, operating under constant terminal voltage is reduced to its output power (P) as

 T ∝ √P.
 T2 ∝ P3.
 T ∝ P.
 T is independent of P.

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Electrical Machines
DC machine windings are

 short pitched
 full pitched
None of these
 either of these

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