DC Generators
Lap winding is composed of

That even number which is exact multiple of poles + 2
Any even number of conductors
That even number which is exact multiple of poles
Any odd number of conductors

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DC Generators
In D.C. generators the polarity of the interpoles

Is the same as that of the immediately preceding pole
Is opposite to that of the main pole ahead
Is the same as that of the main pole ahead
Is neutral as these poles do not play part in generating e.m.f.

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