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The temperature across two different sla...


The temperature across two different slabs A and B are shown I the steady state (as shown Fig) The ratio of thermal conductivities of A and B is

A

`2:3`

B

`3:2`

C

`1:1`

D

`5:3`

Text Solution

Verified by Experts

The correct Answer is:
B
`((dQ)/(dt))xx(1)/(A)=K_A((50-30))/(3)`
`=K_B((50-20))/(3)`
`2KA=3KB`
or, `KA//KB=3//2`
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