Electrical Machines
Which of the following generators are used in arc welding?

 cumulative compound generators
 shunt generators
 differential compound generators
 series generators

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Electrical Machines
Compensating windings are used in DC generators

  mainly to reduce the eddy currents by providing local short circuit.
  to neutralize the cross magnetizing effect of the armature reaction.
None of these
  to provide path for the circulation of cooling air.

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Electrical Machines
DC Motor

  dc shunt with armature resistance control.
  dc shunt motor with field weakening.
  dc compound motor.
  dc series motor.

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