The figure shows a system of two concent...

The figure shows a system of two concentric spheres of radii `r_1 and r_2` are kept at temperature `T_1 and T_2`, respectively. The radial rate of flow of heat in a substance between the two concentric spheres is proportional to

A

`(r_2-r_1)//(r_1r_2)`

B

`In(r_2/r_1)`

C

`(r_1r_2)/((r_2-r_1))`

D

`(r_2-r_1)`

Text Solution

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The correct Answer is:

D

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