Two rods of different materials are clamped at their ends rigidy. When they are heated for the same rise in temperature, same thermal stresses are prouded in them. If their Young's modulll are in the ratio `x:y` then ratio fo coefficients of their linear expanison is

Two rods of different materials are clamped at their ends rigidly. When they are heated for the same rise in temperature, same thermal stresses are produced in them. If their Young.s modulii are in the ratio x:y then ratio of coefficients of their linear expansion is

(A): Two rods of same material but of different lengths are fixed between two rigid points and subjected to same temperature rise. The thermal stress will be more for longer rod. (R): Thermal stress is independent of the length and area of cross-section of the rod.

When the Young's moduli of two wires are in the ratio of 1:2 and their lengths in the ratio 2:1, the stresses required to produce the same elongation are in the ratio

Two spheres of radii R_(1) and R_(2) are made of the same material and are at the same temperature. The ratio of their thermal capacities is:

2 rods made of same material have their radii in the ratio 2:1. Same force was applied on them. Ratio of stress in them is

The ends of the two rods of different materials with their lengths, diameters of cross-section and thermal conductivities all in the ratio 1 : 2 are maintained at the same temperature difference. The rate of flow of heat in the shorter rod is 1cals^(-1) . What is the rate of flow of heat in the larger rod:

The ends of two rods of different materials with their thermal conductivities, radii of cross sections and lengths all in the ratio 1 : 2 are maintained at the same temperature difference, if the rate of flow of heat in the larger rod is 4 cal/ sec, the rate of flow of heat in the shorter rod will be