Question

Briefly explain the construction and working of an electric bell with the help of a labelled diagram.

Answer 1

An electric bell works with the help of an electromagnet. It is made up of a coil of wire wound round an iron piece, resembling an electromagnet.When current passes through it, a magnetic field is produced.

When the circuit is complete, the hammer of the bell is attracted towards the electromagnet. As the hammer moves towards the electromagnet, the circuit breaks. This stops the electromagnet from attracting the hammer anymore. The hammer comes back to its original position due to the spring effect. While doing so, it touches the metal connector and the circuit is complete again. This cycle continues till the key is kept ON.