Question

When a strip made of iron $\left({\alpha }_1\right)$ and copper ${\alpha }_2({\alpha }_2>{\alpha }_1)$ is heated :

• A. Its length does not change.
• B. It gets twisted.
• C. It bends with iron on concave side.
• D. It bends with iron on convex side.

Answer 1

The correct option is C It bends with iron on concave side.

When a strip made of iron $\left({\alpha }_1\right)$ and copper ${\alpha }_2(>{\alpha }_1)$ is heated copper expand more. Due to this, copper bends with iron onthe concave side.