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

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

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DC Generators
When two D.C. generators are running in parallel an equalizer bar is used

To reduce the combined effect of armature reaction of both the machines
To increase the series flux
So that the two identical machines will pass approximately equal currents to the load
To increase the generated e.m.f.

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DC Generators
Inter-pole flux should be sufficient to

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

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