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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

Wires A and B have identical lengths and have circular cross-sections. The radius of A is twice the radius of B, i.e. . 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

Answer: (D)

Solution

Rate is equal for both, so and ;

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Question ID VK-065906