Three rods A, B and C form an equilateral triangle at 0°C. Rods AB and BC have same coefficient of expansion alpha_(1) and rod AC has alpha_2. If change in angle between AB and BC isd theta then temperature through which system is heated.

Three rods A, B and C form an equilateral triangle at 0°C. Rods AB an

1.	Three rods A, B and C form an equilateral triangle at 0°C. Rods AB and BC have same coefficient of expansion alpha_(1) and rod AC has alpha_2. If change in angle between AB and BC isd theta then temperature through which system is heated.
Answer» `( sqrt(2) d THETA)/( 3 ( alpha_(2) - alpha_(1) ))` `(sqrt(3) d theta )/( 2 (alpha_(2) - alpha_(1) ) )` `( sqrt(2) d theta )/( 5 (2 alpha_(2) -alpha_(1) ) )` `( sqrt(3) d theta )/( alpha_(2) - alpha_(1) ) ` ANSWER :B