Question

explain the working of an electric bell​

Answer 1

An electric bell is a mechanical bell that functions by means of an electromagnet.

An electric bell is made up of a coil of wire wound on an iron piece which acts as an electromagnet, when the electric current is passed through it. An iron strip with a hammer at one end is kept close to the electromagnet. There is acontact screw near the iron strip.

When the switch is in the 'ON ' position, the current flows through the coil, it becomes an electromagnet. It pulls the iron strip and the hammer at the end of the strip strikes the gong to produce sound. When the electromagnet pulls the iron strip, the circuit breaks and the current stops flowing. The above process is repeated again and again to continue producing sound.

Answer 2

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$\bold\purple{step1:}$ when electric current flows through the electromagnet it requires magnetism and attract the armature.

$\bold\purple{step2:}$ 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 get switched off.

$\bold\purple{step3:}$ As the current floor stops (due to the break in the circuit), the the electromagnet(immediately) losses its magnetism.it, therefore,no longer attracts the armature.

$\bold\purple{step4:}$ the the armature gets pulled back to its original position by spring action it now again comes in contact with the contacts; the circuit gets completed again. the cycle repeats itself and the gong gets struck again. this intern again breaks the circuit.

$\bold\purple{step5:}$ due due to this alternate making and breaking of the circuit the electric bell goes on ringing continuously as long as the switch is kept pressed.

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hope this helps you fruti