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Electrical Machines

Electrical Machines
In salient pole synchronous machine, the reluctance power varies as

 sin2δ
 cos2δ
 sinδ
 cosδ

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Electrical Machines
The heat generated in the transformer is dissipated mainly by

 radiation.
 conduction.
  convection.
All of these

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Electrical Machines
Which of the following motor has more stability

 salient pole motor
 cylindrical motor
 both motors has same stability
None of these

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Electrical Machines
Which of the following motor is used in grinders?

  Split phase IM.
  Capacitor start IM.
  Capacitor start capacitor run IM.
  Synchronous motor.

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Electrical Machines
Which type of motors are preferred in lifts?

 DC shunt motors.
None of these
 DC series motors.
 DC compound motors.

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Electrical Machines
Exciting current of an induction motor is

  equal as power transformer.
  none of these.
  higher than power transformer.
  lesser than power transformer.

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