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

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Electrical Machines
What will happen if the the supply terminals are reversed in case of a DC shunt motor?

 The motor will run in reverse direction.
 The motor will stop.
 The motor will run at its normal speed in the same direction as before.
 The motor will run much faster in the same direction.

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