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Electrical Machines

Electrical Machines
A 10KVA auto transformer, turn ratio is 0.4. Find the power transferred inductively?

 0 KVA
 10 KVA
 4 KVA
 6 KVA

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Electrical Machines
If the flux of DC motor approaches zero, its speed will

 between zero and infinity.
 aprroach infinity.
 remain unchanged.
 approach zero.

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Electrical Machines
An inverted V-curve of synchronous motor shows the variation of

All of these
 power factor and dc excitation at constant load
 supply voltage and field current at constant excitation
 power factor and supply voltage during hunting

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Electrical Machines
In DC generator, lap winding is used in

 high voltage and low current applications.
 where constant speed is required.
 where greater load is connected.
  high current and low voltage applications.

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Electrical Machines
In DC machines shape of net flux density is?

 sine wave
 peaky in nature
 flat tapped or trapezoidal
 saddle shape

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Electrical Machines
A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor?

 zero
 1470 rpm
 30 rpm
 1500 rpm

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MORE MCQ ON Electrical Machines

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