structure and function of electric bulb
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Light bulbs have a very simple structure. ... The wires and the filament are housed in a glass bulb, which is filled with an inert gas, such as argon. When the bulb is hooked up to a power supply, an electric current flows from one contact to the other, through the wires and the filament
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electric ball is a a photosensitive material map of UP conducting materials it contains one collector another emitter
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