Question

If a bar is made of copper whose coefficient of linear expansion is one and a half times that of iron, the ratio of force developed in the copper bar to the iron bar of identical lengths and cross-sections, when heated through the same temperature range (Young’s modulus of copper may be taken to be equal to that of iron) is(a) 3/2(b) 2/3(c) 9/4(d) 4/9

Answer 1

(Young’s modulus of copper may be taken to be equal to that )(a) 3/2