The temperature drop through each layer of a two layer furnace wall is shown in Assume that the external temperature `T_(10` and `T_(3)` are mainitained constant and `T_(1)gtT_(3)` If the thichness of the layers `x_(1)` and `x_(2)` are the same which of the following statements are correct
.

Options

A. `k_(1)gtk_(2)`
B. `k_(1)ltk_(2)`
C. `k_(1)=k_(2)` but heat flow through material (1) is less then through (2) .
D. `k_(1)=k_(2)` but heat flow through material (1) is less then through (2) .

Answer

A

Explanation

`(dQ)/(dt) =KA(d theta)/(dx0`
`(d theta)/(dx) =` slope of graph `alpha (1)/(K)` .