Question

Bulk modulus of an incompressible liquid is

• A. Zero
• B. Infinity
• C. Unity
• D. Between Zero & Unity

Answer 1

The correct option is B Infinity

We know, $\frac{P}{K}=-\frac{\Delta V}{V}$
Bulk modulus, $K=\frac{-PV}{\Delta V}$
For an incompressible liquid,
$\Delta V$ (change in volume)$=0$
So, for every value of pressure, putting $\Delta V=0$
$\Rightarrow K=\infty$ (infinity)