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A 100W bulb has tungsten filament of tot...

A `100W` bulb has tungsten filament of total length `1.0m` and radius `4xx10^(-5)m` . The emissivity of the filament is `0.8` and `sigma=6.0xx10^(-8)Wm^(-2)K^(-4)` . Calculate the temperature of the filament when the bulb is operating at correct wattage.

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The correct Answer is:
1700 K
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MOTION-HEAT - 1-EXERCISE -3 (Level - I) Subjective | JEE Advanced
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