A) 24 min
B) 3 min
C) 12 min
D) 6 min
Correct Answer: B
Solution :
When two rods are joined, then the rate of flow of heat is given by \[Q=KA\frac{({{\theta }_{1}}-{{\theta }_{2}})}{l}t\] where K is coefficient of thermal conductivity, A is area and I is length when rods are joined in series. \[\Delta {{Q}_{1}}=\frac{A({{T}_{1}}-{{T}_{2}}){{t}_{1}}}{\frac{{{l}_{1}}}{{{K}_{1}}}+\frac{{{l}_{2}}}{{{K}_{2}}}}\]You need to login to perform this action.
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