Write the principle of working of an electric motor. Explain the function of the following parts of an electric motor:
Principle of working of electric motor: A coil carrying electric current placed in an external magnetic field experiences a force.
Function of armature: Enhances the power of the motor and induces motion.
Function of brushes: Helps easy transfer of charge between the coil and the external circuit.
Function of split rings: Reverses the direction of current after each half rotation of the coil so that the coil can keep rotating continuously.