Heat is flowing through two cylindrical rods of the same material. The diameters of the rods are in the ratio 1: 2 and the lengths in the ratio 2: 1. If the temperature difference between the ends is same, then ratio of the rate of flow of heat through them will be
Text Solution
Verified by ExpertsThe correct answer is:
D
Ratio of diameters of rod 1 : 2 and ratio of their lengths 2: 1.
The rate of flow of heat, 
Therefore 
or 
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