Question

Two cylindrical rods each of length 2 are joined in
parallel. Their thermal conductivity are k, and kz.
Their circular area of cross-section are A and 2A
respectively. The equivalent coefficient of thermal
conductivity is
k, + kz
(1)
(2) k. + 2k,
2
A
k, +2k
(3) k + k,
​

Answer 1

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