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Electrical Machines

Electrical Machines
The output power of a dc motor is given by

  EbIa2.
  none of these.
  EbIa.
  EIa.

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Electrical Machines
In DC generator, brushes are always placed along

 load axis.
 armature axis.
 geometrical neutral axis.
  magnetic neutral axis.

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Electrical Machines
On which of the following factor/factors the speed of a DC motor depends upon?

 All of these.
 Applied voltage.
 Field flux.
 Armature current.

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Electrical Machines
In induction motor wound rotor motor is mainly is used in application where

  high starting torque.
 power factor is less.
  less costly motor is not required.
  low starting torque.

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Electrical Machines
The slot edges in a DC machine are made of

  Fibre.
 Silicon steel.
 Cast iron.
 Mild steel.

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Electrical Machines
Motors for fans and pumps are selected in the rpm range

  1440 to 2880.
  500 to 720.
  720 to 920.
  375 to 500.

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MORE MCQ ON Electrical Machines

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