A cylinder of radius R made of material of thermal conductivity `K_(1)` is surrounded by a cylindrical shell of inner radius R and outer radius 3R 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 ?

A solid 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 2R made of material of thermal conductivity K_(2) . The two ends of the combined system are maintained at two different temperatures. Then there is no loss of heat across the cylindrical surface and the system is in steady state. The effective thermal conductivity of the system is

A cylinder A of a material of thermal conductivity K_(1) is surrounded by a cylindrical shell of inner radius equal to the cylinder. The shell is made of a material of thermal conductivity K_(2) . The two ends of the combined system are maintained at two different temperature. if the effective thermal conductivity of the system is (4K_(1) + 5K_(2))/(9) , find the rate of outer radius of the shell to the radius of the cylinder.

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 2R made of a material of thermal conductivity K_2 . The two ends of the combined system are maintained at two different temperatures. There is no loss of heat across the cylindrical surface and the system is in steady state. The effective thermal conductivity of the system is

A cylinder of radius R made of a material of thermal conductivity K_(1) is surrounded by cylindrical shell of inner radius R and outer radius 2R made of a material of thermal con-ductivity K_(2) The two ends of the combined system are maintained at two differnet tem-peratures There is no loss of heat across the cylindrical surface and system is in steady state What is the effective thermal conductivity of the system .

A cylinder of radius R made of a material of thermal conductivity K_(1) is surrounded by cylindrical shell of inner radius R and outer radius 2R made of a material of thermal con-ductivity K_(2) The two ends of the combined system are maintained at two differnet tem-peratures There is no loss of heat across the cylindrical surface and system is in steady state What is the effective thermal conductivity of the system .

A cylinder of radius R made of a material of thermal conductivity K_1 is surrounded by a cylinderical shell of inner radius R and outer radius 2R made of a material of thermal conductivity K_2 . The two ends of the combined system are maintained at two different temperatures. There is no loss of heat across the cylindrical surface and the system is in steady state. The effictive thermal conductivity of the system is