The coefficient of linear expansion of a solid is L. The volume V of a cube of this solid on being heated by 1°C will change by
- A. VL
- B. 3VL
- C. 3L
- D. VL/3
Answer: B. 3VL
Explanation: Volume expansion coefficient $\beta \approx 3\alpha$. Change in volume $\Delta V = V \beta \Delta T = V (3L) (1) = 3VL$.