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Two rods with conductivities in a given ratio have equal thermal resistance: ratio of their lengths

The same question, asked 2 times: 15 Apr 2026 S2*, 18 Apr 2026 S1. Every wording below, oldest first.

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  1. Question 1

    15 Apr 2026 S2

    112
    The ratio of the thermal conductivity of two rods of different materials is 6:5. The two rods of same area of cross section and same thermal resistance will have the length in the ratio

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  2. Question 2

    18 Apr 2026 S1

    114
    The ratio of thermal conductivity of two rods of different materials is 4:34 : 3. The two rods have same area of cross-section and same thermal resistance. The lengths of rods are in the ratio

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