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Electrical Machines

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

 low.
 negative.
 positive.
  zero.

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Electrical Machines
A DC generator without commutator is a

 AC generator
 induction motor
 DC motor
 DC generator

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Electrical Machines
Which of the following is/are the methods to reduce the armature reaction and its effects?

 pole stacking
All of these
 pole chamfering
 compensating winding

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Electrical Machines
A simple method of increasing the voltage of a DC generator is to

  increase the speed of shaft rotation.
 increase the number of turns in armature coil.
 increase the number of turns in field coil.
 increase the source frequency.

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Electrical Machines
Total core loss is also called as -------------?

 Eddy current loss
 Copper loss
 Magnetic loss
 Hysteresis loss

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Electrical Machines
In salient pole synchronous machine, maximum power occurs at a load angle of

 0°
 Greater than 90°
 90°
 less than 90°

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