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A slab consists of two parallel layers o...

A slab consists of two parallel layers of two different materials of same thickness having thermal conductivities `K_(1)` and `K_(2)`, the equivalent conductivity of the combination is :

A

`2/3K`

B

`sqrt(2)K`

C

`3K`

D

`(4)/(3)K`.

Text Solution

Verified by Experts

The correct Answer is:
D
In seires `k_(s)(2k_(1)k_(2))/(k_(1)+k_(2))=(2*k*2k)/(k+2k)=(4)/(3)k`.
Correct choice is (d).
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