25 Shown below is a composite rod of metal A and B Their

Last updated: 6/5/2023

25 Shown below is a composite rod of metal A and B Their thermal coefficients of linear expansion are a and a2 Their lengths are L and L2 respectively If on heating the length of the entire composite rod does not change then which of the following relations is true A 4 1 2 L L 3 L L 0 B dz 4