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How much energy will be emitted from a f...

How much energy will be emitted from a furnace at 3000K temperature active as a perfect black body per unit area in 1 hour ?
`(sigma=5.7xx10^(-8)" Wm"^(-2)K^(-4))`

A

`1.1xx10^(12)J`

B

`1.7xx10^(10)J`

C

`4.6xx10^(6)J`

D

`2.8xx10^(8)J`

Text Solution

Verified by Experts

The correct Answer is:
B
`W=AesigmaT^(4)t`
`=(1)(1)xx5.7xx10^(-8)xx(3000)^(4)xx3600`
`=16621.1xx10^(6)=1.66212xx10^(10)J`
`~~1.7xx10^(10)J`
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