First slide

Elastic Modulie

Question

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

Easy

A

If both assertion and reason are true and reason is a true explanation of assertion
B

If both assertion and reason are true but reason is not the correct explanation of assertion
C

If assertion is true but reason is false
D

If both assertion and reason are false

Solution

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

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