Q. The coefficient of superficial expansion of a solid is $2 \times 10^{- 5}/℃$. Its coefficient of linear expansion is
A) $4 \times 10^{- 5}/℃$
B) $3 \times 10^{- 5}/℃$
C) $2 \times 10^{- 5}/℃$
D) $1 \times 10^{- 5}/℃$
Explanation
(d) $\alpha = \frac{\beta}{2} = \frac{2 \times 10^{- 5}}{2} = 10^{- 5}/℃$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.