Electrical Machines
Under which of the following conditions hunting of synchronous motor is likely to occur ?

  Over-loading for long period.
  Over-excitation.
  Periodic variation of load.
  Small and constant load.

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Electrical Machines
If two 8-pole dc machines of identical armature sare wound, one with lap winding and the other with wave winding, then

 lap-wound machine will have more rated voltage and less current
 wave-wound machine will have more rated voltage and less current
 wave-wound machine will have more rated current and more voltage
 lap-wound machine will have more rated voltage and more current

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