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An irregular rod of same uniform materi...

An irregular rod of same uniform material as shown in figure is conducting heat at a steady rate. The temperature gradient at various sections versus area of cross section graph will be

A

B

C

D

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The correct Answer is:
B
`H= KA(dT)/(dx)` is same in steady condition, `therefore A(dT)/(dx)` = constant `therefore` rectangular hyperbolic graph
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