Question

What is armature , brushes and split rings?

Answer 1

A ring, split into at least two segments, they allow current to flow to thearmature winding (via carbon brushes) switching the polarity as the rotor turns. ... The 'split ring' is actually the coils of the armature that start and finish on the commutator. The commutator segments are placed to assure proper polarity.

armature
the rotating coil or coils of a dynamo or electric motor.
any moving part of an electrical machine in which a voltage is induced by a magnetic field.
a piece of iron or other object acting as a keeper for a magnet.

A brush is a device which conducts current between stationary wires and moving parts, most commonly in a rotating shaft. Typical applications include electric motors, alternators and electric generators.