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Five rods of the same dimension are arranged as shown . AB are maintained at different temperatures . No Heat flows through the central rod ; then


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Answer : $\;K_{1}K_{2}=K_{3}K_{4}$
Explanation :
Since no heat flows through the central rod , temperatures at C and D are the same .
The above is like a wheatstone Network .
$\large\frac{L_{1}}{K_{1}A_{1}} \;. \large\frac{L_{2}}{K_{2}A_{2}} = \large\frac{L_{3}}{K_{3}A_{3}} \; . \large\frac{L_{4}}{K_{4}A_{4}}$
answered Mar 25, 2014 by yamini.v

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