As soon as the electric current is passed through the electric circuit of an electric bell :

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The electromagnet loses its magnetism.

The electromagnet is attracted towards the gong.

The hammer strikes the iron strip.

The wounded iron coil becomes magnetic.

answer is A.

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Detailed Solution

Electric bell works on the principle of electromagnetism.
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It consists of an electromagnet, switch, iron strip, contact screw, hammer and a gong.

When the switch is ON, the circuit gets closed and an electric current is passed through the circuit.
Due to the electric current, the wounded iron coil starts acting as an electromagnet.
This electromagnet pulls the iron strip.
In the process, the hammer at the end of the strip strikes the gong of the bell to produce a sound.

Therefore, 'The wounded iron coil becomes magnetic' is the correct response.

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