Electrical Machines
Number of tappings for each equalizer ring is equal to

  number of pole pairs.
  number of poles.
  number of commutator segments.
  number of parallel paths.

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Electrical Machines
For a given torque, reducing divertor resistance of a DC series motor

  Increase in speed demanding more armature current.
  Decrease in speed demanding less armature current.
  Decrease in speed but armature current remains the same.
  Increase in speed but armature currnet remains the same.

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