Question 348: Properties of Matter

Question

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K
1
and K
2
. The thermal conductivity of the composite will be
![](https://neetcare-image.cdn.examgoal.net/1qpq2yck7i2u57q/1f6e3f52-a0de-4e89-945e-936bad05efa2/8c384860-60b4-11ea-bddc-5f310cab17d0/file-1qpq2yck7i2u57r-303w.jpg)

Accepted Answer

Equivalent thermal conductivity of the composite rod in parallel combination will be,
$K = {{{K_1}{A_1} + {K_2}{A_2}} \over {{A_1} + {A_2}}} = {{{K_1} + {K_2}} \over 2}$

Answer

${{3\left( {{K_1} + {K_2}} \right)} \over 2}$

Answer

${K_1} + {K_2}$

Answer

$2\left( {{K_1} + {K_2}} \right)$

Answer

${{{K_1} + {K_2}} \over 2}$

Properties of Matter

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K 1 and K 2 . The thermal conductivity of the composite will be

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