Electrical Machines
In a DC Motor 3 point starter is used to

 provide protection against Low-Voltage.
 all of above.
 limit the starting current to a safer value.
 provide overload protection.

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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

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

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Electrical Machines
The coil spam

  may or may not be exactly equal to people pitch.
 must be exactly equal to people pitch.
 none of above.
 can never be equal to pole pitch.

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