1.

The ratio of loss of heat from a metal sphere at 327^(@)C to that of the same sphere at 527^(@)C. When placed in the surrounding of temperature 127^(@)C is

Answer»

`(1)/(2)`
`(13)/(48)`
`(22)/(48)`
`(1)/(16)`

Solution :`(R_(1))/(R_(2))=(T_(1)^(4)-T_(0)^(4))/(T_(2)^(4)-T_(0)^(4))=(500^(4)-400^(4))/(800^(4)-400^(4))=(13)/(48)`


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