DC Generators
In dc generator, the constant losses is equal to

Mechanical losses
Stray losses plus shunt cu loss
None of the listed here
Stray losses

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

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

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