Electrical Machines
Find the developed torque DC Series Motor having armature resistance of 0.2 Ω and taking armature current of 60 A is connected to 250 V supply. Considered brush drop of 1 V each.

 cant be determined.
 234.76 N-m.
 133.22 N-m
 266.20 N-m.

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Electrical Machines
Flashing the field of DC generator means

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

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