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

 increase in speed demanding more armature current.
 increase in speed but armature currnet remains the same.
 decrease in speed demanding less armature current.
 decrease in speed but armature current remains the same.

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Electrical Machines
Which of the following represents the commutator pitch?

 Number of commutator segments between two successive coils.
 Number of conductors spanned by one coil at the back end of the armature.
 Number of conductors spanned by one coil at the front end of the armature.
 The distance between the staring of first coil and its next successive coil

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