Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities $ K$ and $2K$ respectively. The equivalent thermal conductivity of the slab is
Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities $ K$ and $2K$ respectively. The equivalent thermal conductivity of the slab is
- [AIPMT 2003]
- A
$\sqrt {2K} $
- B
$3K$
- C
$\frac{4}{3}K$
- D
$\frac{2}{3}K$
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