Electrical Machines
If an induction machine is run at above the synchronous speed it acts as

 a synchronous motor
None of these
 an induction motor
 an induction generator

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Electrical Machines
An inverted V curve of synchronous motor shows variation of

 supply voltage and field current at constant excitation.
 power factor and supply voltage during hunting.
  power factor and DC excitation at constant load.
 supply voltage and excitation current at constant load.

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Electrical Machines
In a synchronous generator with constant steam input supplies power to an infinite bus at a lagging power factor. If the excitation is increased

 both power angle and power factor increase
 power angle decrease and power factor increase
 both power angle and power factor decrease
 power angle increase and power factor decrease

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