Two sheets of thickness $d$ and $2 d$ and same area are touching each other on their face. Temperature $T_A$, $T_B$, $T_C$ shown are in geometric progression with common ratio $r = 2$. Then ratio of thermal conductivity of thinner and thicker sheet are
Two sheets of thickness $d$ and $2 d$ and same area are touching each other on their face. Temperature $T_A$, $T_B$, $T_C$ shown are in geometric progression with common ratio $r = 2$. Then ratio of thermal conductivity of thinner and thicker sheet are
- A
$1$
- B
$2$
- C
$3$
- D
$4$
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