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

Options

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

Answer

A, B, C, D

Explanation

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`