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Metallized Filaments

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  P-425

2025-12-25

583

If the carbon filament is "metallized" by subjecting it to the intense heat of an electric furnace, it is rendered much more refractory, that is, capable of being brought to a higher temperature without melting. The higher temperature causes the metallized filament to give out more light than the ordinary carbon filament for the same expenditure of electrical energy. A carbon lamp gives 16 candle power for about 50 watts, requiring 3.1 watts per candle power. The metallized filament lamp gives about 20 candle power for 50 watts, or 2.5 watts per candle power.