Question

write the working of electric motor with diagram ​

Answer 1

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Answer 2

1 When the circuit is completed with a plug key or switch the current flows in the direction E-A-B-C-D-F. As the magnetic field is directed from the north pole to the South Pole the force on AB is downward and that on CD is upward by Fleming's left hand rule .Hence, AB moves downward and CD upward this forces are equal magnitude and opposite in direction. Therefore as observed from the side in the loop ABCD and axle start rotating in anticlockwise direction.

2. After half rotation, X and Y come in contact with brushes F and E respectively and the current flows in the direction EDCBAF. Hence, the force on CD is downward and that on AB is upward. Therefore, the loop and the axle continue to rotate in the anticlockwise direction.

3. After every half rotation the current in the loop is reversed and the loop and the axle continue to rotate in anticlockwise direction.

When the current is switched off the loop stops rotating after sometime