Electrical Machines
If the excitation is increased, the power factor is

 unity power factor
 lagging power factor
None of these
 leading power factor

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Electrical Machines
What is/are the necessary conditions for voltage build up in self excited generator?

All of these
 Field winding resistance should be less than critical resistance.
 Field winding should be properly connected to armature winding.
 Poles should contain residual flux.

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