DC Generators
In a four-pole D.C. machine

Two north poles follow two south poles
All the four poles are north poles
Alternate poles are north and south
All the four poles are south poles

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DC Generators
While applying Fleming's right-hand rule to and the direction of induced e.m.f., the thumb points towards

Direction of flux
Direction of induced e.m.f.
Direction of motion of conductor, if forefinger points along the lines of flux
Direction of motion of the conductor if forefinger points in the direction of generated e.m.f.

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