Question

Explain the thermal expansion with the help of an example.

Answer 1

Thermal expansion:

1. When the temperature acts on the body, it undergoes a change in the length, width, height, or volume of the material.
2. Since the atoms are tightly packed in solids, thermal expansion is seen evidently here.
3. Three types of thermal expansions are linear expansion, area expansion, and volume expansion.
4. For example, when heat is passed through a wire, its length increases.