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Electrical Machines

Electrical Machines
Induction motors have the advantage of

  less maintenance.
  less cost.
  simple in construction.
  all of below.

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Electrical Machines
The flux is maximum in the following part of a DC motor:

 under the interpole.
 pole core.
 under trailing pole tip.
 under leading pole tip.

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Electrical Machines
Reluctance and hysteresis motors are the types of which electrical motor?

 Stepper motor.
 3 - Φ induction motor.
  1 - Φ synchronous motor.
 DC motor.

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Electrical Machines
Silicon content in steel lamination is kept within 5% as it

All of these
 makes the material brittle.
 increases hysteresis loss.
 Increases cost.

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Electrical Machines
Which of the following statement is correct, if short circuit ratio is high?

 Low short circuit current
 Good voltage regulation
None of these
 High voltage regulation

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Electrical Machines
If the air gap of IM is increased, ____________ will increase.

  speed.
  magnetizing current.
  air gap flux.
  power factor.

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