Coefficent of liner espansion of bress and steel rods and `alpha_(1)` and `alpha_(2)` Lengths of brass and steel roda are `l_(1)` and `l_(2)` respectively, If `(l_(2)-l_(1))` is maintained same at all temperatures, which one of the following relations holds good ?

Options

A. `alpha_(1)l_(1) = alpha_(2)l_(2)`
B. `alpha_(1)l_(2) = alpha_(2)l_(1)`
C. `alpha_(1)^(2) l_(2) = alpha_(2)^(2)l_(1)`
D. `alpha_(1) l_(2)^(2) = alpha_(2) l_(1)^(2)`

Answer

a