Two different rods A and B are kept as shown in figure. ratio of thermal conductivities of A and B i

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10-2.Transmission of Heat

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Two different rods $A$ and $B$ are kept as shown in figure. The ratio of thermal conductivities of $A$ and $B$ is

A

$2$

B

$0.5$

C

$1$

D

$0.67$

Solution

$i_{1}=i_{2}$

$\frac{\mathrm{K}_{1} \mathrm{A}(30)}{30}=\frac{\mathrm{K}_{2} \mathrm{A}(35)}{70}$

$\frac{\mathrm{K}_{1}}{\mathrm{K}_{2}}=\frac{1}{2}$

Standard 11

Physics

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