Electrical Machines
If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will

  continue running in the same direction as before.
  run in a direction opposite to previous one.
  get damaged.
  not run.

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

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