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ELECTRICAL MACHINES

Electrical Machines
Value of specific electric loading of Induction motor is in the range of

 40 - 400 ampere conductor / metre.
  400 - 4000 ampere conductor / metre.
  5000 - 45000 ampere conductor / metre.
 30000 - 100000 ampere conductor / metre.

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Electrical Machines
Larger values of air flux density is taken while designing IM for

  none.
  larger bore diameter.
  both.
  larger output.

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Electrical Machines
The stator frame in an induction motor is used to

  provide return path for the flux.
  hold armature stamping in position.
  protect the whole machine.
  ventilate the armature.

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Electrical Machines
The frame of an induction motor is made of

  closed grained cast iron.
  aluminium.
  stainless steel.
  silicon steel.

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Electrical Machines
Use of fractional pitch winding

  results in reduced leakage reactance.
All of these
  make it stiffer.
  results in reduced axial length of the machine.

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