An incandescent lamp filament has an area of 50 mm 2 and operates at a temperature of
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An incandescent lamp filament has an area of 50 mm2 and operates at a temperature of 2127 °C. Assume that all the energy furnished to the bulb is radiated from it. If the filament’s emissivity is 0.83, how much power must be furnished to the bulb when it is operating?
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