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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_(1)r_(2))/((r_(2)-r_(1)))`

B

`(r_(2)-r_(1))`

C

`((r_(2)-r_(1)))/(r_(1)r_(2))`

D

`ln(r_(2)/(r_(1)))`

Text Solution

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The correct Answer is:
A
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