Two thin metallic spherical shells of radii 
and 
are placed with their centers coinciding. A material of thermal conductivity K is filled in the space between the shells. The inner shell is maintained at temperature 
and the outer shell at temperature 
. The rate at which heat flows radially through the material is:-
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Thermal resistance of spherical sheet of thickness dr and radius r is
Thermal current (i) 
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