Two thin rods of length L and 2L at certain temperature have coefficient of linear expansion `2alpha` and `alpha` respectively Both are joined end to end. Then the effective coefficient of linear expansion of the composite rod is

If two rods of length L and 2L having coefficients of linear expansion alpha and 2alpha respectively are connected so that total length becomes 3L, the average coefficient of linear expansion of the composite rod equals

If two rods of length L and 2L having coefficients of linear expansion alpha and 2alpha respectively are connected so that total length becomes 3L, the average coefficient of linear expansion of the composite rod equals

Two different wires having lengths L_(1) and L_(2) and respective temperature coefficient of linear expansion alpha_(1) and alpha_(2) are joined end - to - end . Then the effective temperature coefficient of linear expansion is :

Two metallic rods of length l and 3l have coefficient of linear expansion alpha and 3alpha respectively. The coefficient of linear expansion ofr their series combinations, is

Two wires of resistance R_(1) and R_(2) have temperature coefficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effective temperature coefficient of resistance is

Two wires of resistance R_(1) and R_(2) have temperature coefficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effective temperature coefficient of resistance is

Two rods having length l_(1) and l_(2) , made of materials with the linear coefficient of expansion alpha_(1) and alpha_(2) were welded together. The equivalent coefficients of linear expansion for the obtained rod:-

There are two rods of length l_1 and l_2 and coefficient of linear expansions are alpha_1 and alpha_2 respectively. Find equivalent coefficient of thermal expansion for their combination in series.

Two rods of lengths l_(1) and l_(2) are made of materials having coefficients of linear expansion alpha_(1) and alpha_(2) respectively. What could be the relation between above values, if the difference in the lengths of the two rods does not depends on temperature variation?

The coefficient of linear expansion of an in homogeneous rod change linearly from alpha_(1) to alpha_(2) from one end to the other end of the rod. The effective coefficient of linear expansion of rod is