Electrical Machines
In dc machine armature windings are placed on rotor because of the necessity for

 electromechanical energy conversion.
 commutation.
 generation of voltage.
 development of torque.

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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

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

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