DC Generators
Lap winding is composed of

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

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DC Generators
In a D.C. generator

Internal characteristic = magnetization characteristic ohmic drop
External resistance = internal characteristic armature reaction
Magnetization characteristic = external characteristic
External characteristic = magnetization characteristic ohmic drop armature reaction

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