![A bimetallic cylindrical bar of cross sectional area 1 m2 is made by bonding Steel](https://www.gkseries.com/blog/wp-content/uploads/2023/10/A-bimetallic-cylindrical-bar-of-cross-sectional-area-1-m2-is-made-by-bonding-Steel.jpg)
Q. A bimetallic cylindrical bar of cross sectional area 1 m2 is made by bonding Steel (Young’s modulus = 210 GPa) and Aluminium (Young’s modulus = 70 GPa) as shown in the figure. To maintain tensile axial strain of magnitude 10-6 in Steel bar and compressive axial strain of magnitude 10-6 in Aluminum bar, the magnitude of the required force P (in kN) along the indicated direction is
![](https://www.gkseries.com/blog/wp-content/uploads/2023/10/image-60.png)
(A) 70 (B) 140 (C) 210 (D) 280
Ans: 280