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A 10w electric bulb has tungsten filamen...

A 10w electric bulb has tungsten filament of surface area `5 xx 10^(-5) m^2`. What is the temperature of the filament when incandescent ? Emissivity of the filament is 0.35 and Stefan's constant is `5.67 xx 10^(-8) Jm^(-2) s^(-1) k^(-4)`.

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