Question

: Bulk modulus if elasticity (K) represents incompressibility of the material. : Bulk modulus of elasticity is proportional to change in pressure.

• A. If both assertion and reason are true and the reason is the correct explanation of the assertion
• B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
• C. If assertion is true but reason is false
• D. If assertion and reason both are false

Answer 1

Answer: (A)

If both assertion and reason are true and the reason is the correct explanation of the assertion

Answer 2

Bulk modulus of elasticity measures how good the body is to regain its original volume on being compressed. Therefore, it represents incompressibility of the material. $K =\frac{- PV }{\Delta V }$ where $P$ is increase in pressure, $\Delta V$ is change in volume.