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Electrical Machines

Electrical Machines
The heat generated in the transformer is dissipated mainly by

 conduction.
All of these
 radiation.
  convection.

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Electrical Machines
What type of dielectric material is used in capacitors used for fans and for power factor correction?

  Oil impregnated paper.
  Mica.
  Vacuum.
  Glass.

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

  larger output.
  both.
  none.
  larger bore diameter.

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Electrical Machines
If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is

 minimum
 zero
 maximum
All of these

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Electrical Machines
If terminal voltage of one 1000 rpm shunt motor is reduced to half the speed of the motor will be

 1000 rpm
 250 rpm
 2000 rpm
 500 rpm

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Electrical Machines
The induction motor shaft is made of

  stainless steel.
  mild steel.
  aluminium.
  cast iron.

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