Question

The Bulk Modulus for an incompressible liquid is

• A. zero
• B. unity
• C. infinity
• D. between $0$ and $1$

Answer 1

Answer: (C)

The bulk modulus is
$B=-\frac{PV}{\Delta V}$
If liquid is incompressible, so
$\Delta V=0$
Hence, $B=-\frac{pV}{0}=\infty$
$\Rightarrow B=\infty$ (infinity)