Electric Bell
An electric bell is a mechanical bell that functions by means of an electromagnet. At the point when an electric current is connected, it delivers a monotonous humming or clanking sound.It comprises of coils of insulated wire wound round iron rods. At the point when an electric current moves 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.