Electrical Machines
The change in speed of a DC generator due to increased load is corrected by

  increasing armature resistance.
 increasing armature cooling.
  increasing input power of the prime mover.
  increasing terminal voltage.

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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

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

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