Question

Pressure on an object increases from 1.01 × 10⁵ Pa to 1.165 × 10⁵ Pa. Its volume decreases by 10% at constant temperature. Bulk modulus of material is ............... . (A) 1.55 × 10⁵ Pa (B) 51.2 × 10⁵ Pa (C) 102.4 × 10⁵ Pa (D) 204.8 × 10⁵ Pa

Answer 1

(A) 1.55 × 105 P Bulk modulus = [p / {– (Δv / v)}]

Given – (Δv / v) = 10% = (10 / 100) = 0.1

∴ bulk modulus = {(1.165 × 105 – 1.01 × 105) / 0.1 = 0.155 × 105 × 101. = 1.55 × 105 pa