Heat transfer

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By Expert Faculty of Sri Chaitanya
Question

Two different rods A and B are kept as shown in figure.

The variation of temperature of different cross sections is plotted in a graph shown in figure.
The ratio of thermal conductivities of B to A is __________.

Moderate
Solution

ΔQΔtA=ΔQΔtBKAA(10070)30=KBA(7035)70KA=KB2KBKA=2


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