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Electrical Machines

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

 Magnetic loss
 Hysteresis loss
 Copper loss
 Eddy current loss

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Electrical Machines
Eg (generated emf) and Eb (back emf) both are

 same.
 different.
 changes.
 none of above.

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Electrical Machines
In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________.

 increased.
 kept constant to certain value.
  remains unchanged.
 decreased.

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Electrical Machines
In dc machines, the space waveform of the air-gap flux distribution affects

 torque but not the voltage
 voltage but not the torque
 both the torque and voltage
 neither the voltage nor the torque

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Electrical Machines
Dynamic braking is very effective for

 differential compound motors.
 series motors.
 separately excited motors.
 shunt motors.

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Electrical Machines
Rotating part of DC motor is known as

 Pole.
 Starter.
 Armature.
 Carbone brush.

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MORE MCQ ON Electrical Machines

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