Introduction:
An electric bell is a device that produces sound when an electric current is passed through it. It is commonly used in schools, offices, and homes as an alerting device.

Diagram:
The diagram of an electric bell includes the following parts:

1. Electromagnet
2. Armature
3. Spring
4. Hammer
5. Gong or bell

Working:
When an electric current passes through the coil of the electromagnet, it creates a magnetic field. This magnetic field pulls the armature towards the electromagnet, causing it to strike the hammer. The hammer then hits the gong or bell, creating a ringing sound.

Components:
Each of the components of an electric bell has its own function in the working of the bell.

1. Electromagnet: The electromagnet is made up of a coil of wire wrapped around a core of iron. When an electric current is passed through the coil, it creates a magnetic field.

2. Armature: The armature is a piece of iron that is attracted to the magnetic field created by the electromagnet. When the magnetic field is strong enough, the armature is pulled towards the electromagnet.

3. Spring: The spring is attached to the armature and provides a restoring force to pull the armature back to its original position when the electric current is turned off.

4. Hammer: The hammer is attached to the armature and strikes the gong or bell to produce sound.

5. Gong or bell: The gong or bell is the component of the electric bell that produces the sound.

Conclusion:
In conclusion, the electric bell is an important device used for alerting purposes in schools, offices, and homes. It works by using an electromagnet to attract an armature which in turn hits a hammer that strikes a gong or bell to produce sound.