Question

Explain the working of a simple electric bell with the help of a circuit diagram.

Answer 1

Electric bell is an electronic device with mechanical parts that move when current is passed through it. The bell functions through an electromagnet. It produces repetitive buzzing or clanging sound. It consists of a hammer, a metal strip, a gong and a switch.


It is made up of a coil of wire wound on an iron piece. The coil acts as an electromagnet when electric current is passed through it. It works on the principle of electromagnetism.

The hammer of the bell is attracted towards the electromagnet when the circuit is complete. Further, the circuit breaks after the hammer moves towards the electromagnet. When the circuit breaks, the electromagnet does not attract the hammer and the hammer returns to its original position because of spring effect. As the hammer goes back to its original position, it touches the metal connector and the circuit is complete again. This cycle continues till the time the switch is kept ON.