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Filament Shape
Dec 28, 2018

The resistance of the filament at room temperature is tens of ohms or even hundreds of ohms. Such a large resistor has a long length, the bulb cannot be accommodated, and the heat generated by the current through the filament is quickly dissipated, and the filament cannot be brought to a predetermined temperature. (2000 ° or so), the filament is made spiral, which is conducive to heat preservation, and in the case of the same resistance filament, it can also increase the length of the filament.

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