Question

write the working of electric bell

Answer 1

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. Electric bells have been widely used at railroad crossings, in telephones, fire and burglar alarms, as school bells, doorbells, and alarms in industrial plants, since the late 1800s, but they are now being widely replaced with electronic sounders. It consists of coils of insulated wire wound round iron rods. When an electric current flows through the coils, the rods became magnetic and attract a piece of iron attached to a clapper. The clapper hits the bell and makes it ring

Answer 2

Answer:

Hii user.....

Good evening....

Here is your answer.....

Electric bell....

The electric bell is a simple

household device based on the magnetic effects of current. It consists of a gong, an electromagnet, a soft iron rod (armature) and a Contact screw, all arranged in an electric circuit as shown in the diagram here.

Working of an electric bell

✓When current flows through the electromagnet it acquires

magnetism and attract thearmature.

✓As the armature bends towards the electromagnet, the gong is struck. But at

the same time contact between armature and contact screw gets broken

and the circuit gets switched off.

✓As the current flow stops (due to the break in the circuit), the electromagnet

(immediately) loses it magnetism. It, therefore, no longer attracts thearmature.

✓The armature gets pulled back to its original position by spring action.

It, now, again comes in contact with the contact screw; the circuit gets

Completed again. The cycle repeats itself and the gong gets struck again.

This, in turn, again breaks the circuit.

✓Due to this alternate making and breaking of the circuit (which takes place

very rapidly), the electric bell goes on ringing continuously as long as the

switch is kept pressed.

Explanation:

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