The thin wire, or filament, inside a light bulb resists the flow of current through it. When electricity is passed through the bulb, the filament becomes hot and glows brightly. To prevent the filament burning away completely, the glass bulb is filled with a mixture of inert gases (usually argon and nitrogen). The filament in most light bulbs is made of tungsten.
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Namrata
The thin wire, or filament, inside a light bulb resists the flow of current through it. When electricity is passed through the bulb, the filament becomes hot and glows brightly. To prevent the filament burning away completely, the glass bulb is filled with a mixture of inert gases (usually argon and nitrogen). The filament in most light bulbs is made of tungsten.