Two rods of different materials are placed between massive walls as shown in figure. The cross section of the rods is A, their moduil of elastricity are `E_(1)` and `E_(2)` respectively. If rods are heated by t degrees, then (coefficients of liner expansion of material of rods are `alpha_(1)` and `alpha_(2)` respectively)

Options

A. the strain produced in both rods is equal
B. the stress produced in both the rods is equal
C. the force exerted by one rod on the other is `(alpha_(1)l_(1)+alpha_(2)l_(2))/((l_(1))/(E_(1))+(l_(2))/(E_(2)))At`
D. the force exerted by one rod on the other is `((E_(1)-E_(2))^(2)A)/(E_(1)+E_(2))`

Answer

B, C