DC Generators
Lap winding is composed of

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

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

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

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

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

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