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in Physics by (44.9k points)
Heat is flowing through two cylindrical rods made of same materials whose ends are maintained at similar temperature. If diameters of the rods are in ratio `1:2` and lengths in ratio `2:1`, then the ratio of thermal current through them in steady state is:
A. `1:8`
B. `1:4`
C. `1:6`
D. `4:1`

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