construction and working of motor
Answers
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electric motor consists of a rectangular coil ABCD placed between the two poles of magnet such that the arm AB and CD are mutually perpendicular to each other
The ends of the coil are connected to the split rings P and Q
the inner sides of these halves are made insulated and attached to an axle
the external conducting edges P and Q touch two stationary brushes X and Y respectively.
working........
current in the coil ABCD enters from the source battery through conducting brush X and flows back to the battery through Y.
The current in arm AB of the coil flows from A to B . In arm CD it is from C to D that means it is opposite to the direction of current
applying F.L.H.R we find that force acting on arm AB pushes downwards while force acting on CD is upwards
This the coil and axle O , mounted free to turn about an axis , rotate anti- clockwise
After half rotation Q makes contact with brush X and P makes contact with brush Y
Therefore the current in the coil gets reversed and flows along the path DCBA
