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

  Oil impregnated paper.
  Vacuum.
  Glass.
  Mica.

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Electrical Machines
Flashing the field of DC generator means

 increasing flux density by adding extra turns of winding.
  neutralising residual magnetism.
  making the magnetic losses forces parallel.
  creating residual magnetism by a DC source.

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