DC Generators
The size of a dc generator can be reduced by using ______

Iron commutator
High resistance winding material
Magnetic material of high permeability
Lap winding

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

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