Question

Write the working of electric motor in brief means short

Answer 1

Electric motor is the device with coverts electrical energy to mechanical energy. It consists of rectangular coil abcd brushes split rings. When the circuit is closed the current moves in direction abcd after half rotation the current is changed by the split rings. It now moves from dcba. Hence the motor moves half a turn more in the same direction giving rise to direct current (DC)

Answer 2

WORKING:

1) When the circuit is completed with a plug key or switch , the current flows in the direction E ---> A ---> B ---> C ---> 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.These forces are equal in magnetiude and opposite in the direction.Therefore, as observed from the side AD , the loop ABCD and axel start roatating in anticlockwise direction.

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

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

when the current is switched off, the loop stops rotating after some time.

HOPE SO IT WILL HELP YOU......