A composite rod made of copper (1.8×10^(-5) K^(-1)) and steel (α=1.2×10^(-5) K^(-1)) is heated. Then ___________
(a) It bends with steel on concave side
(b) It bends with copper on concave side
(c) It does not expand
(d) Data is insufficient
This question was posed to me in homework.
My query is from Thermal Expansion in chapter Thermal Properties of Matter of Engineering Physics I