Electrical Machines
Short circuit test is performed on a transformer with a certain impressed voltage at rated frequency. If the short circuit test is now performed with the same magnitude of impressed voltage, but at frequency higher than the rated frequency then

 The magnitude of circuit as well as the power factor will decrease.
 The magnetude of current will increase, but power factor will decrease.
 The magnitude will both increase.
 The magnitude of current will decrease but the power factor will increase.

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Electrical Machines
In an alternator, voltage drops occurs in

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

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