Question

The increase in length of a solid when heated is called:

• A. Thermal expansion
• B. Linear expansion
• C. Superficial expansion
• D. Cubical expansion

Answer 1

The correct option is B

Linear expansion

Explanation of correct and incorrect options:

1. The expansion of a substance by the absorption of heat energy is called thermal expansion.
2. There are three types of thermal expansion: Linear expansion, superficial expansion, and cubical expansion.
3. Linear expansion: The expansion in length of a substance by absorbing heat energy.
4. Superficial expansion: The expansion in the area of a substance by absorbing heat energy.
5. Cubical expansion: The expansion of the volume of a substance by absorbing heat energy.

Hence, option (b) is the correct option.