Describe the construction and working of an electric bell with the help of a diagram.
Answers
MAIN COMPONENT OF
ELECTRIC BELL
Important parts of an electric bell are :
1. Electromagnet
2. Armature
3. Spring
4. Armature rod
5. Hammer
6. Gong
CONSTRUCTION
One end of armature winding is connected to terminal T1 and the other to a spring, which is mounted on a soft iron strip. A rod is attached to the armature and the free end of the rod carries a small hammer, which strikes a bell. A very light spring is attached to a screw, which is joined to terminal T2.
WORKING OF ELECTRIC BELL
The electric circuit is completed through a battery and push switch button connected to the terminal T1 and T2. When the push button is pressed the electric circuit is completed and the armature is attracted towards the electromagnet as a result, the small spring gets detached from the screw due to which the electric circuit is broken and the electromagnet is demagnetized. Hence, the attraction disappears and the armature is brought back by the spring to its original position. Contact of the spring with the screw is now remade, which completes the electric circuit. The action is repeated over and over again consequently. The armature vibrates and hammer attached to it strikes the gong and the bell rings and sound is produced.
An electric bell contains an magnet.
An electric bell contains an magnet consisting of coils of insulated wire wound spherical iron rods. Once an electrical current flows through the coils, the rods become magnetic and attract a chunk of iron connected to a clapper. The clapper hits the bell and makes it ring.
