DC Generators
In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when

There is no load on the generator
The generator runs on full load
The generator runs on designed speed
The generator runs on overload

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

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