Q. A uniform cube is subjected to volume compression. If each side is decreased by 1%, then bulk strain is
A) 0.01
B) 0.06
C) 0.02
D) 0.03
Explanation
(d) If side of the cube is $L$ then $V = L^{3} \Rightarrow \frac{dV}{V} = 3\frac{dL}{L}$
$\therefore\%$ change in volume $= 3 \times$ (% change in length)
$= 3 \times 1\% = 3\%$
$\therefore$ Bulk strain, $\frac{\mathrm{\Delta}V}{V} = 0.03$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.