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Electrical Machines

Electrical Machines
An ideal DC generated is one that has _____________ voltage regulation.

 negative.
 low.
  zero.
 positive.

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Electrical Machines
In a synchronous motor torque or load angle δ ------------- with increase in load

 decreases
 remains unaffected
 increases
None of these

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Electrical Machines
A 8-pole, DC generator has a simplex wave-wound armature containing 32 coils of 6 turns each. Its flux per pole is 0.06 Wb. The machine is running at 250 rpm. The induced armature voltage is

 96 V
 192 V
 768 V
 384 V

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Electrical Machines
The torque speed characteristics of a AC servomotor is approximately

 hyperbola
 parabola
 linearised
 any of the above

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Electrical Machines
In DC machine shape of armature MMF wave is?

 Triangular and directed towards brush axis.
 Saddle shape.
 Peaky in nature.
 Triangular and directed towards main pole.

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Electrical Machines
The three point starter is used for

  Shunt motor.
  Series motor.
  Shunt motor as well as compound motors.
  Shunt, compound and series motor.

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