Question
Three identical rods A, B and C form an equilateral triangle. The material of rods A and B is same and that of C is different. When the structure will be heated, what would be the new shape of structure?
Solution
The temperature coefficient of expansion of different materials is different. The structure is an equilateral triangle at low temperature. When it is heated, the rod A and B will expand by same length but the increase in length of C will be different as that from A and B. Thus the new structure will form an isosceles triangle.
