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Electrical Machines

Electrical Machines
Maximum power developed depends on

 voltage
 load angle
 both 1and 2
 reactance

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Electrical Machines
If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is

 115 V
 200 V
 460 V
 230 V

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Electrical Machines
In DC generator, lap winding is used in

  high current and low voltage applications.
 high voltage and low current applications.
 where constant speed is required.
 where greater load is connected.

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Electrical Machines
Which of the following is/are not a self starting motor?

 3-phase induction motor
 both 1 and 2
 1-phase induction motor
None of these

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

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

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Electrical Machines
If the excitation is reduced, the power factor is

 unity power factor
 leading power factor
None of these
 lagging power factor

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MORE MCQ ON Electrical Machines

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