A cylinder of radius R made of a material of thermal conductivity K 1 is surrounded by a cylindrical shell of inner radius R and outer radius 3 R made of a material of thermal conductivity K 2 . T

Question

A cylinder of radius R made of a material of thermal conductivity K 1 ​ is surrounded by a cylindrical shell of inner radius R and outer radius 3 R made of a material of thermal conductivity K 2 ​ . The two ends of the combined system are maintained at two different temperatures. What is the effective thermal conductivity of the system?

TestHub · Accepted Answer

The two are in parallel. The areas are π R 2 and π ( 9 R 2 − R 2 ) = 8 π R 2 . K e ff ​ = 9 K 1 ​ ( 1 ) + K 2 ​ ( 8 ) ​ . B.

Physics - Heat & Thermo Question with Solution | TestHub

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