Electrical Machines
Flashing of DC generator means

 neutralization of residual magnetism.
  increasing flux density by providing extra ampere-turns in field.
  creation of residual magnetism by a DC source.
None of these

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Electrical Machines
In an alternator, voltage drops occurs in

  armature resistance and leakage reactance.
  armature resistance, leakage reactance, armature reaction and earth connection.
  armature resistance only.
  armature resistance, leakage reactance and armature reaction.

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