DC Generators
The bearings used to support the rotor shafts are generally

Bush bearings
Needle bearings
Magnetic bearings
Ball bearings

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

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