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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

`K_1 + K_2`

B

`\frac { K_1 + K _ { 2 } } { 2 }`

C

`\frac { 2K_1 K _ { 2 } } { K_1 + K_2 }`

D

`\frac { K_1 + K _ { 2 } } { 2K_1 K_2 }`

Text Solution

Verified by Experts

The correct Answer is:
B
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