Question

Draw a neat labelled diagram of electric motor and write its principle. 

Hint:

Remember: The principle of an electric motor is based on the interaction of magnetic fields and electric current which generates motion.

Answer 1

The electric motor works on the principle of the force experienced by a current-carrying conductor placed in a magnetic field. When a current-carrying conductor is placed in a magnetic field, it experiences a force which tends to move the conductor. The direction of the force is given by Fleming’s Left-Hand Rule, which states that when the thumb, forefinger, and middle finger of the left hand are held at right angles, the thumb points in the direction of motion (force), the forefinger points in the direction of magnetic field, and the middle finger points in the direction of current. A labeled diagram of an electric motor is shown below: