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Sir/Madam My question is 'How does a bulb work'?
An electric bulb consists of a transparent glass covering that encloses a thin,coiled metal wire known as the filament.The filament is made up of tungsten that is  supported by two thick wires.It has a tiny coiled wire which is supported by two thick wires making a V- shape. This tiny coiled wire is called a filament. The two wires making this V- shape are known as supporting wires. The lower end of one of the wires is joined to the metal casing at the side of the bulb. The lower end of the second wire is joined to the metal tip at the base of the bulb. The metal casing at the lower end and the metal tip at the base form the terminals of the bulb. On passing current through the terminals, the electric bulb produces light.


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