DC Generators
Inter-pole flux should be sufficient to

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

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

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.
To reduce the combined effect of armature reaction of both the machines

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DC Generators
Lap winding is composed of

That even number which is exact multiple of poles + 2
That even number which is exact multiple of poles
Any odd number of conductors
Any even number of conductors

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