question_answer

An aluminum rod and a copper rod of equal length 1 m and cross-sectional area \[1\text{ }c{{m}^{2}}\]are welded together as shown in the figure. One end is kept at a temperature of \[20{}^\circ C\]and other at \[60{}^\circ C\]. Calculate the amount of heat (in joule/sec) taken out per second from the hot end. Thermal conductivity of aluminum is \[200\text{ }W/m{}^\circ C\]and of copper is\[390\text{ }W/m{}^\circ C\]. 

Answer:

(2.36)