Electrical Machines
In DC generators, electric current to the external circuit from armature is given through

 none of above.
 solid connection.
 commutator.
 slip rings.

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

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

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