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A body radiates heat at the rate of 5 ca...

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

Text Solution

Verified by Experts

The correct Answer is:
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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