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Three cylindrical rods A, B and C of equ...


Three cylindrical rods A, B and C of equal lengths and equal diameters are joined in series as shown if Fig. Their thermal conductivities are 2K, K and 0.5K, respectively. In steady state, if the free ends of rods A and C are at `100^@C` and `0^@C`, respectively, calculate the temperature at the two junction points. Assume negligible loss by radiaiotn through the curved surface. What will be the equivalent thermal conductivity?

A

`K_(eq)=(6/7)K`

B

`K_(eq)=(4/5)K`

C

`K_(eq)=(8/7)K`

D

`K_(eq)=(7/6)K`

Text Solution

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The correct Answer is:
A
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