Question

Which among the following factors does not influence the increase in volume of solids?

• A. The final temperature
• B. The constant temperature
• C. The final volume of solid
• D. The initial volume of solid

Answer 1

The correct option is D

The initial volume of solid

Increase in volume of a body on heating is referred to as volumetric expansion or cubical expansion.
Consider a metallic body of volume(initial) = $V_1$ . If the temperature is raised by $\Delta T$, then experimentally increase in volume $\Delta V$ is directly proportional to its initial volume $V_1$ and rise in temperature $\Delta T$.

It can be mathematically expressed as,
$\Delta V=\beta \times V_1\times \Delta T$

where $\beta$ is the coefficient of cubical expansion.
Therefore, for increase in volume factors like initial and final volume, change in temperature is significantly important. Whereas the source of heat does not affect expansion.