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Electrical Machines

Electrical Machines
Swinburne test is conducted under which of the following condition?

 no load
 any of the above
 full load
 half load

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Electrical Machines
For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio

 33.3%
 57.7%
 50%
 66.3%

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Electrical Machines
Inter pole winding is connected in-------------------------- ?

 parallel with main poles
 series with armature
 series with main poles
 parallel with armature

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Electrical Machines
If the field current is reduced to zero the maximum power developed by alternator is

 0.9103 KW.
 5.46 KW.
  2.73 KW.
 1.644 KW.

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Electrical Machines
A 4 pole 50 Hz induction motor is running at 1470 rpm. What is the slip value?

 0.2
 0.4
 0.04
 0.02

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Electrical Machines
In a DC generator in case the brushes are moved so as to bring them in magnetic neutral axis, then, there will be

  cross-magnetisation.
  none of above.
  cross-magnetization as well as demagnetization.
 demagnetisation.

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