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

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

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DC Generators
In a dc generator, the eddy current power loss is

Directly proportional to thickness of each lamination
Directly proportional to sqaure of thickness of each lamination
None of the listed here
Inversely proprtional to thickness of each lamination

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