DC Generators
The copper loss is constant for

Both shunt and compound generator
None of the listed here
Shunt generator only
Series generator only

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

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

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DC Generators
Wave winding is composed of

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

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