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Electrical Machines

Electrical Machines
Stepper motor is used in

 traction
 food processing
All of these
 computer printers

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

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

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Electrical Machines
What is the effect of armature reaction ?

 None of the options.
 Armature flux weakens the main field flux.
  Both option B and C.
 Armature flux distorts the main field flux.

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Electrical Machines
The change in speed of a DC generator due to increased load is corrected by

  increasing terminal voltage.
  increasing armature resistance.
  increasing input power of the prime mover.
 increasing armature cooling.

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Electrical Machines
Which machine is used for battery charging?

 Compounded DC generator.
 DC shunt generator.
 DC series generator.
 None of these.

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Electrical Machines
A 3 - Φ, 6 pole, 50 Hz IM has a rotor speed of 987 rpm find rotor frequency?

 0.75 Hz.
  60 Hz.
  0.65 Hz.
 0.70 Hz.

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MORE MCQ ON Electrical Machines

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