Question

A uniform cube is subjected to volume compression. Each side gets decreased by 1%, then the bulk strain is

• A. $0.01$
• B. $0.03$
• C. $0.06$
• D. $0.09$

Answer 1

The correct option is B $0.03$

If side cube is l, then
volume $V=l^3$
For change in volume $\frac{\Delta V}{V}=\frac{3dl}{l}$
$\therefore$ % Change in volume $=3\times$ % change in length
$=3\times 1$%
Hence, bulk strain $=\frac{\Delta V}{V}=0.03$