DC Generators
Which of the following will not prevent a self excited shunt generator from building upto its full voltage?

Wrong direction of rotation
Speed too high
Open field
No residual magnetism

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

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

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