Question

The ratio of hydraulic stress to the corresponding strain is known as

• A. Compressibility
• B. Bulk modulus
• C. Young's modulus
• D. Rigidity modulus
• E. Expansion coefficient

Answer 1

The correct option is B Bulk modulus

Bulk modulus of elasticity is defined as ratio of hydraulic stress to the corresponding the volumetric strain within the elastic limit.
Bulk modulus $K=\frac{FV}{A\Delta V}=\frac{\Delta p\cdot V}{\Delta V}$
where, $\Delta p=\frac{F}{A}=$ change in pressure.