An aluminum rod of length 
and a steel rod of length 
both having same cross-sectional area, are soldered together end-to-end. The thermal conductivity of aluminum rod and steel rod is 
and 50 
respectively. The temperatures of the free ends are maintained at 
and 
. What is the temperature of the junction?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
In series
Let T be the temperature of the junction. So, using formula for heat exchange rate
As area of both rods is same, so
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