The figure shows a system of two concentric spheres of radii r 1 and r 2 and 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
B
C
D
(r 2 – r 1 )
Text Solution
Verified by ExpertsThe correct answer is:
C
Radial rate of flow 
or 
or 
is proportional to 
.
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