An electric bulb has a filameent of surface area 20" cm"^(2). The filament is raised to a temperature of 1727^(0)C, when a current passes through it. If Stefan.s constant is 5.7xx10^(-8)W//m^(2)k^(4) and the emissivity of the filament is 0.5, the electric power being consumed to maintain this temperature is

An electric bulb has a filameent of surface area 20" cm"^(2). The fila

1.	An electric bulb has a filameent of surface area 20" cm"^(2). The filament is raised to a temperature of 1727^(0)C, when a current passes through it. If Stefan.s constant is 5.7xx10^(-8)W//m^(2)k^(4) and the emissivity of the filament is 0.5, the electric power being consumed to maintain this temperature is
Answer» 456 W 45.6 W 912 W 91.2 W Answer :C