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, leakage reactance and armature reaction.
  armature resistance only.

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Electrical Machines
No load primary current in a transformer

 leads the applied voltage by exactly 90Â&
 leads the applied voltage somewhat less than 90Ã&
 lags behind applied voltage somewhat less than 90Ã
 lags behind applied voltage by exactly 90Â&am

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