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state the working principle of incondenscent tube?

Answer Posted / Amit Singh

The incandescent lamp works on the principle of thermal energy conversion. When an electric current passes through a filament (usually made of tungsten), it heats up and glows, producing visible light due to the high temperature. The filament is enclosed in a glass bulb filled with an inert gas such as argon or nitrogen to prevent oxidation and prolong the life of the filament.

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