The surface of a house hold radiator has an emissivity of 0.5 and an area of 1.5 `m^(2)`. The rate at which the radiation is emitted by then the radiator when its temperature is `47^(@)C` will be nearly (`sigma=5.7xx10^(-8)` Si units)A. 598 wattB. 299 wattC. 448 wattD. 346 watt

The surface of a house hold radiator has an emissivity of 0.5 and an a

1.	The surface of a house hold radiator has an emissivity of 0.5 and an area of 1.5 `m^(2)`. The rate at which the radiation is emitted by then the radiator when its temperature is `47^(@)C` will be nearly (`sigma=5.7xx10^(-8)` Si units)A. 598 wattB. 299 wattC. 448 wattD. 346 watt
Answer» Correct Answer - C `E=sigma A rhoT^(4)` `=5.7xx1.5xx(1)/(2)xx1.5xx0.5xx[3.20xx10^(2)]` `=5.7xx1.5xx(1)/(2)xx10.24xx10.24` `=5.7xx0.75xx10.24xx10.24` =448 watt.

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The surface of a house hold radiator has an emissivity of 0.5 and an area of 1.5 `m^(2)`. The rate at which the radiation is emitted by then the radiator when its temperature is `47^(@)C` will be nearly (`sigma=5.7xx10^(-8)` Si units)A. 598 wattB. 299 wattC. 448 wattD. 346 watt

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