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

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

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DC Generators
Inter-pole flux should be sufficient to

Neutralize the commutating self induced e.m.f.
Neutralize the armature reaction flux
None of these
Neutralize both the armature reaction flux as well as commutating e.m.f. induced in the coil

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