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Three rods of identical cross - section and lengths are made of three different materials of thermal conductivity K1,K2 and K3, respectively. They are joined together at their ends to make a long rod (see figure). One end of the long rod is maintained at 100∘C and the other at 0∘C (see figure). If the joints of the rod are at 70∘C and 20∘C in steady state and there is no loss of energy from the surface of the rod, the correct relationship between K1,K2 and K3 is : |
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Answer» Three rods of identical cross - section and lengths are made of three different materials of thermal conductivity K1,K2 and K3, respectively. They are joined together at their ends to make a long rod (see figure). One end of the long rod is maintained at 100∘C and the other at 0∘C (see figure). If the joints of the rod are at 70∘C and 20∘C in steady state and there is no loss of energy from the surface of the rod, the correct relationship between K1,K2 and K3 is : |
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