mention the working of an electric bell.
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it is consists of a coil of wire wound on an iron piece the coil acts as an electromagnet An iron strip with the hammer at one end is kept close to the electromagnet.There is a contact screw near the iron strip.When the iron strip is in the contact with the screw the current flows through the coil which becomes an electromagnet.It then pulls the iron strip.In this process the hammer at the end of the strip strikes at the gong of the bell to produce a sound
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