Electrical Machines
In an alternator, voltage drops occurs in

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

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Electrical Machines
A DC shunt generator builds up to a voltage of 220 V at no load while running at its rated speed. If the speed of the generator is raised by 25% kepping the circuit conditions unaltered, then the Voltage to which the machine would build up will

 increase to 1.25 times 220 V
 increase to value lying between 220 V and 1.25 times 220 V
 not change and remain at 220 V
 increase to a value greater than 1.25 times 220 V

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Electrical Machines
No load primary current in a transformer

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

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