Simple Homemade Electric Bell
The electric bell is one that we can always meet in many places because almost all schools use electric bell.
Anlectric bell is a mechanical bell that functions by means of an electromagnet. When an electric current is applied, it produces a repetitive buzzing or clanging sound. Electric bells have been widely used at railroad crossings, in telephones, fire and burglar alarms, as school bells, doorbells, and alarms in industrial plants, since the late 1800s, but they are now being widely replaced with electronic sounders.
P.Manikandan
7th Standard
P.U.M.S 1-3 Ward Uthiramerur
Kancheepuram
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