Electrical Machines
Magnetic field of a DC generator is produced by what?

 Permanent magnets.
 None of the options.
 Both B and C.
  Electromagnets.

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Electrical Machines
In a star - delta starting of an IM

  reduced voltage is applied to the stator.
  resistance is inserted in the rotor.
  line voltage is 57.7 % of stator voltage.
  applied voltage per stator phase is 57.7 % of a line volt

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Electrical Machines
A 10 kW, 230 V, dc shunt machine has four terminals brought out through four leads. For this machine

 armature winding has thin leads whereas field winding has thick leads
 armature winding has thick leads whereas field winding has thin leads
 both the windings have thin leads
 both the windings have thick leads

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