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The surface of a black body is at a temp...

The surface of a black body is at a tempera ture `727^(@)C` and its cross section is `1m^(2)` Heat radi ated from this surface in one minute in Joules is (Stefan's constant `=5.7 xx 10^(-8) W//m^(2)//k^(4))` .

A

`34.2xx10^(5)`

B

`2.5xx10^(5)`

C

`3.42xx10^(5)`

D

`2.5xx10^(6)`

Text Solution

Verified by Experts

The correct Answer is:
A
`(E)/(At)=sigmaeT^(4)`
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