A body radiates heat at the rate of 5 cal/`m^(2)-s` when its temperature is `227^(@)C`. The heat radiated by the body when its temperature is `727^(@)
A body radiates heat at the rate of 5 cal/`m^(2)-s` when its temperature is `227^(@)C`. The heat radiated by the body when its temperature is `727^(@)C` is
A. 10 cal`m^(2)` s
B. 20 cal/`m^(2)` s
C. 40 cal/`m^(2)` s
D. 80 cal/`m^(2)` s
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Correct Answer - D
`(E_(2))/(E_(1))=((T_(2))/(T_(1)))^(4)=((1000)/(500))^(4)`
`E_(2)=16E_(1)`
`=16xx5=80cal//m^(2)s`
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