CalorimetryHard
Question
Two rods having length l1 and l2, made of materials with the linear coefficient of expansion α1 and α2, were welded together. The equivalent coefficients of linear expansion for the obtained rod :-
Options
A.
B.
C.
D.
Solution
l1(1 + α1ᐃT) + l2(1 + α2 ᐃT) = lf
lf = l1 + l2 + (l1α1+ l2α2)ᐃT
lf = (l1 + l2)
lf = l1 + l2 + (l1α1+ l2α2)ᐃT
lf = (l1 + l2)
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