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Electrical Machines

Electrical Machines
Maximum power developed depends on

 both 1and 2
 reactance
 voltage
 load angle

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Electrical Machines
Wave winding is prefered for which of the following rating?

 low current and low voltage
 low current and high voltage
 high current and high voltage
 high current and low voltage

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Electrical Machines
Eb/Vt ratio of a DC motor is an indication of

 starting torque.
 running torque.
 efficiency.
 speed regulation.

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Electrical Machines
Which of the following DC motors has almost constant speed over their full load range?

  Shunt.
 Compound (cummolative).
 none of these.
 Series.

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Electrical Machines
An induction motor having 8 poles runs at 727.5 rpm. If the supply frequency is 50Hz, the emf in the rotor will have a frequency of

 48.5Hz
 51.5Hz
 2.5Hz
 1.5Hz

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Electrical Machines
The armature reaction mmf in a DC machines has a form of

  triangular.
 sinusoidal.
 rectangular.
 trapezoidal.

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MORE MCQ ON Electrical Machines

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