Question

Describe briefly the working principle of Electric door bell.

Answer 1

The switch is pressed and current flows through the circuit.

The electromagnet is powered and generates a magnetic field that attracts the iron strip towards it.

The striker strikes the gong (bell).

When the striking arm strikes the gong, the contact is broken and current stops flowing through the circuit.

This causes the electromagnet to lose its magnetic field.

The connected spring arm returns the striker to its original rest position.

The contact is restored and current flows through the circuit (provided the main switch is still pressed).

The process is repeated from the beginning.

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Answer 2

An electric bell is a mechanical bell that functions by means of an electromagnet. When an electric current is applied, it produces a repetitive buzzing or clanging sound. When an electric current flows through the coils, the rods became magnetic and attract a piece of iron attached to a clapper..

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