HOW IS SOUND PRODUCED IN A SCHOOL BELL??? PLEASE TELL HAVE TO COMPLETE MY N.B.
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Due to vibration
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Working of bell
:When current is passed through the circuit, the electromagnet acts like a magnet and attracts the iron strip. The iron strip(hammer), being elastic, strikes the bell. Simultaneously, its contact with the screw is broken, the circuit breaks and the current stops flowing through the electromagnet.
As such, the iron strip returns to its original position, and again the current passes through the electromagnet.
This phenomenon happens many times in a second, and as the hammer strikes the bell, the sound is heard. The bell rings till the circuit has been switched off.
The electric bell is used in alarms and bells is schools, offices, homes and industries.
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