1.

A body radiates heat at the rate of 50 J/s at 300 K. when the same body is at 600 K then its rate of radiation of heat will beA. 100 J/sB. 200 J/sC. 400 J/sD. 800 J/s

Answer» Correct Answer - D
`(E_(2))/(E_(1))=((T_(2))/(T_(1)))^(4)=((600)/(300))^(4)=2^(4)`
`E_(2)=16xx50=800J//s`.


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