Three rods of equal lengths are joined to form an equilateral triangle ABC. D is the mid-point of AB. The coefficient of linear expansion is `alpha_1`, for material of rod AB and `alpha_2`, for material of rods of rods AC and BC. If the distance DC remains constant for small changes in temperature, then

Three rods of equal of length are joined to from an equilateral triangle ABC. D is the midpoint of AB. The coefficient of linear expansion is alpha_(1) for AB and alpha_(2) for AC and BC . If the distance DC remains constant for small changes in temperature,

Three rods of equal of length are joined to from an equilateral triangle ABC. D is the midpoint of AB. The coefficient of linear expansion is alpha_(1) for AB and alpha_(2) for AC and BC . If the distance DC remains constant for small changes in temperature,

Three rods of equal of length are joined to from an equilateral triangle ABC. D is the midpoint of AB. The coefficient of linear expansion is alpha_(1) for AB and alpha_(2) for AC and BC . If the distance DC remains constant for small changes in temperature,

As shown in the figure , an equilateral triangle ABC is formed by joining three rods of equal lengths and D is the midpoint of AB. Coefficient of linear expansion of the material of AB is alpha_1 and that of AC and BC is alpha_2 . If the length DC remains constant for small changes in temperature , then

An equilateral triangle ABC is formed by joining three rods of equal length and D is the mid-point of AB . The coefficient of linear expansion for AB is alpha_(1) and for AC and BC is alpha_(2) . The relation between alpha_(1) and alpha_(2) , if distance DC remains constant for small changes in temperture is

Two rods , one of aluminium and the other made of steel, having initial length l_(1) and l_(2) are connected together to from a sinlge rod of length l_(1)+l_(2) . The coefficient of linear expansion for aluminium and steel are alpha_(a) and alpha_(s) for AC and BC . If the distance DC remains constant for small changes in temperature,