Electrical Machines
In Ward-Leonard system, the lower limit of the speed imposed by

 Residual magnetism of the generator.
 Armature resistance.
 Field resistance.
 None of above.

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

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Electrical Machines
With the increase in speed of DC motor

 Back emf falls and line current increase.
 Both back emf as well as line current fall.
  Back emf increase but line current falls.
 Both back emf as well as line current increase.

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