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Electrical Machines

Electrical Machines
If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is

 minimum
 maximum
 zero
All of these

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Electrical Machines
Series booster is a

 shunt wound DC generator.
 separately excited DC generator.
  series wound DC generator.
 permanent magnet DC generator.

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Electrical Machines
In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve

 reduced size.
 high efficiency.
  quick acceleration.
 low starting torque.

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Electrical Machines
A triangular mmf wave is produced in the air gap of an electric machine. Such wave is produced by

 stator of a dc machine.
 rotor of a dc machine.
 stator of a induction machine.
 rotor of an synchronous machine.

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Electrical Machines
In an induction motor, the no-load slip is generally equal to

 4 %.
 1.5 %.
  less than 1 %.
  zero.

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Electrical Machines
The armature voltage control is considered suitable for a DC motor driven at constant

 power.
 current.
 torque.
 speed.

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MORE MCQ ON Electrical Machines

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