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The graph shown gives the temperature al...

The graph shown gives the temperature along an `X` axis that extends directly through a wall consisting of three layers `A`, `B` and `C`. The air temperature on one side of the wall is `150^(@)C` and on the other side is `80^(@)C`. Thermal conduction through the wall is steady. out of the three layers `A` `B` and `C` thermal conductivity is greatest of the layer

A

A

B

B

C

C

D

Thermal conductivity of A = Thermal conductivity of B.

Text Solution

Verified by Experts

The correct Answer is:
A
Rate of heat transfer is same through all walls
`(K_(1)*A*(10))/(40cm)=(K_(2)A(20))/(20cm)=(K_(3)A(40))/(10cm)`
`rArrK_(1)/4=K_(2)=4K_(4)rArrK_(1)=4K_(2)=16K_(3)`
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