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The temperature of the two outer surfaces of a composite slab consisting of two materials having coefficient of thermal conductivity K and 2K and thickness x and 4x respectively are `T_2` and `T_1(T_2gtT_1)`. The rate of heat transfer through the slab in steady state is `((AK(T_2 -T_1))/x)f`. where, f is equal to
.

A

1

B

`1//2`

C

`2//3`

D

`1//3`

Text Solution

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The correct Answer is:
D
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MOTION-HEAT TRANSFER & THERMAL EXPANSION -Exercise - 3 Section-B
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  12. A long metallic bar is carrying heat from one of its ends to the other...

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  13. A long metallic bar is carrying heat from one of its ends to the other...

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