Q.
Heat is flowing through two cylindrical rods of the same material. The diameters of the rods are in the ratio 1 : 2 and their lengths are in the ratio 2 : 1. If the temperaturedifference between their ends is the same, then the ratio of the amounts of heat conducted through them per unit time will be:
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a
1 : 1
b
2 : 1
c
1 : 4
d
1 : 8
answer is D.
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Detailed Solution
Heat conducted Time=KA(θ1-θ2)l∞Al
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