Name: Working of an Electric Bell
Uploaded: 2019-07-19
Duration: 4 min 44 s
Description: Electromagnets form the base of many common devices, including an electric bell. Let’s open up one such electric bell to see how it works in this video.

Question

Draw the circuit diagram of electric door bell and explain its functioning.

Accepted Answer

An electric door bell consists of an electromagnet, an armature, a contact adjusting screw, A gong and hammer.

When the switch is pushed on, the circuit gets completed and current starts flowing through the electromagnet which creates a magnetic field in the core. This attracts the iron armature. When the armature moves towards the electromagnet, the hammer strikes the gong and the bell rings. But as the armature moves towards the electromagnet, the contact with the adjustment screw breaks which breaks the closed circuit and stops the current.
When there is no current in the coil of the electromagnet, the electromagnet does not behave like a magnet. The armature returns to its original position. This making and breaking of the circuit of the electromagnet continue as long as the button remains pressed

Draw the circuit diagram of electric door bell and explain its functioning.

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