Insight - How Electric Bulb works

 
How Electric Bulb works7
 
The filament which is the heart of the electric bulb is shown in the image above. It is made up of tungsten, which has a high melting point and emits light in the visible spectrum when heated. The filament is in the form of a spiral shape wire.
 
 
This image shows how the filament is connected to the contact wire.
 

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