1.

Two identical objects A and B (emissivitye_(A) and e_(B),e_(A)!=e_(B)) are placed in an enclosure. Temperatuure of body A,B and enclosure are same and constant:

Answer»

Heat emitted by body `A` is not equal to heat emitted by body `B`
Heat ABSORBED by body `A` is not equal to heat absorbed by body `B`
If `e_(A)gte_(B)`, body `A` absorbs more heat than body `B`
If `e_(A)lte_(B)`, body `A` emits less heat than body `B`

SOLUTION :
EMISSIVITY of body `e`
Area of body `A`
Temperature of body `T_(B)`
Temperature of environment `T_(0)`
Heat ENERGY radiated by body `=esigmaAT_(B)^(4)`
Absorbed by body `=esigmaAT_(0)^(4)`

`e_(A)!=e_(B)`
Then heat emitted by a body is not equal to `B`


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