Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A composite rod is made by joining two cylindrical sections of the same material of thermal conductivity 
in series. The first section has radius 
and length 
, and the second has radius 
and length 
. The ends are maintained at temperatures 
and 
respectively, with 
. What is the correct expression for the steady-state rate of heat flow 
through the rod?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
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