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Electrical Machines

Electrical Machines
If the applied voltage of a DC motor is 230 V, then back emf, for maximum power developed is

 230 V.
 200 V.
 115 V.
 460 V.

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Electrical Machines
In a resistance split phase motor, what is the range of torque angle?

 25° to 30°
 70° to 85°
 0°
 90°

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Electrical Machines
Lamination of core are generally made of

 silicon steel.
 carbon.
 stainless steel.
 cast iron.

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Electrical Machines
Eddy current loss will depends on

 Frequency
 Thickness
All of these
 Flux density

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

 Copper loss
 Magnetic loss
 Hysteresis loss
 Eddy current loss

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Electrical Machines
In an induction motor, what is the ratio of rotor input to rotor copper loss?

 1/S
 1/(1-S)
 1-S
 S

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MORE MCQ ON Electrical Machines

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