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

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

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,

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

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,

" The relation between coefficient of linear expansion "(alpha_(1))" and coefficient of volume expansion ( "alpha_(5)" ) is "