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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 speed of stator rotating magnetic field (RMF) with respect to rotor is

 Nr
 Zero
 Ns
 S.Ns

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Electrical Machines
Dynamic braking can be used for

All of these
 compound motors.
 series motors.
 shunt motors.

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Electrical Machines
A flat compound generator is obtained from compound generator by connecting a variable resistor

 in series with the series field
 in parallel with the series field
 in parallel with the shunt field
 in series with the shunt field

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Electrical Machines
Stray losses in transformer occurs in

 transformer insulating oil.
 steel core.
  winding conductors and steel structures of transformer.
 paper insulation in transformers.

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Electrical Machines
If field current is decreased in shunt dc motor, the speed of the motor

None of these
 decreases.
 remains same.
 increases.

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MORE MCQ ON Electrical Machines

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