Question

The bimetallic strip made from brass and iron bends when heated. When it's bent the shape is :

• A. brass on the outer side
• B. iron on the inner side
• C. iron on the outer side
• D. both (a) and (b)

Answer 1

The correct option is D

both (a) and (b)

1. Different solid materials expand differently on heating with the same temperature.
2. On heating with the same temperature brass will expand more than iron.
3. In a bimetallic strip, the material expands more will be on the outer side and less will be on the inner side.
4. In the case of a bimetallic strip made up of brass and iron, brass will be on the outer side and iron will be on the inner side, since brass expands more than iron.
5. Diagram Representation
   
   Hence option (d) is the correct answer.