Question

A slab consists of two parallel layers of two different materials of same thickness having thermal conductivities and . The equivalent thermal conductivity of the slab is :

A

B

C

D

Medium

Solution

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Correct option is C)

At thermal equilibrium

Given that two slab are in parallel and have same dimensions.
,
whereΒ  is the effective thermal conductivity, is the temperature difference between the ends of the slab, is area of the slab and is the thickness of the each layer of the slab
So,
or,

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Solution To Question ID 144785
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