physics

• The electric motor consists of a rectangular loop of copper wire having a resistive coating.
• The loop is placed between the north pole and south pole of a magnet (such as a horse shoe magnet) in such a way that its branches AB and CD are perpendicular to the direction of magnetic field.
• The two ends of the loop are connected to the two halves (X and Y) of the split ring.
• The two halves of the split ring have resistive coating on their inner surfaces and are tightly fitted on the axle.
• The two halves of the split ring, X and Y, have their outer conducting surfaces in contact with the two stationary carbon brushes, E and F, respectively.