Which of the following cylindrical rods will conduct most heat when their ends are maintained at steady temperatures θ1oC and θ2oC? The rods are made of same material.
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answer is 4.
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Detailed Solution
Thermal resistance R=lπr2×K and thermal current Ith=∆θRNow lr2 is least when l=1m and r=2cmHence Ith is maximum for option (4)