Question

A uniform cube is subjected to volume compression. If each side is decreased by 1% Then what is bulk strain ? 

(A) 0.01 

(B) 0.06 

(C) 0.02 

(D) 0.03

Answer 1

Correct option:  (D) 0.03

Explanation: 

If side of cube = L then

Volume = V = L³ 

Hence (dV / V) = 3 ∙ (dL / L)

% change in volume = 3 × % change in length

Given : % change in length = 1%

∴ % change in volume = 3%

(ΔV / V) = 0.03

Bulk modulus = (ΔV / V) = 0.03