Wires A and B have identical lengths and have circular cross-sections. The radius of A is twice the radius of B , i.e. R A = 2 R B . For a given temperature difference between the two ends, both w

Question

Wires A and B have identical lengths and have circular cross-sections. The radius of A is twice the radius of B , i.e. R A ​ = 2 R B ​ . For a given temperature difference between the two ends, both wires conduct heat at the same rate. The relation between the thermal conductivities is given by:

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Equal rates need K A ​ R A 2 ​ = K B ​ R B 2 ​ . K A ​ = K B ​ R A 2 ​ R B 2 ​ ​ = 4 K B ​ ​ . D.

Physics - Heat & Thermo Question with Solution | TestHub

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