Question

37. Ends of a rod A of length having thermal
conductivity K is maintained at temperature Ti
and T2 (T->T2). The thermal current through the
rod is Q. Now another rod B of same length and
area of cross section as that of rod A and having
thermal conductivity 2K is welded together side
by side and common ends of the combination is
maintained at temperature T, and T2. The new
thermal current through the combination will be
(1) Q
(2) 2Q
(3)Q/2
(4) 3Q
​

Answer 1

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