JEE Main · Physics ↓ Falling

Mechanical Properties of Solids appeared 21 times across 3 years — 2.4% of Physics. This question is from Bulk Modulus.

Year 2026 2025 2024 Total
Questions 4 9 8 21

The increase in pressure required to decrease the volume of a water sample by 0.2% is P × 10⁵ Nm ⁻² . Bulk modulus of water is 2.15 × 10⁹ Nm ⁻² . The value of P is ____.

Numerical Answer Type:
Enter a numerical value Answer: 43 to 43 +4 marks

Solution & Explanation

Related Formula

Bulk Modulus formula:

B = - (Δ P)/((Δ V)/(V)) Δ P = B ( (-Δ V)/(V) )
Core Logic

Given specifications:

  • Fractional volume drop, (-Δ V)/(V) = 0.2% = (0.2)/(100) = 2 × 10⁻³
  • Bulk modulus value, B = 2.15 × 10⁹ N/m²
  • Calculating excess pressure:

Δ P = 2.15 × 10⁹ × 2 × 10⁻³ Δ P = 4.3 × 10⁶ N/m² = 43 × 10⁵ N/m²

Comparing with P × 10⁵, we get P = 43.

Pattern Recognition

Bulk modulus measures a fluid's resistance to compression. A tiny percentage reduction in volume requires a massive amount of pressure due to water's near-incompressibility.

Chapter Mix

Class 11 Physics: Mechanical Properties of Solids

Reference Study Guides

More Mechanical Properties of Solids Previous-Year Questions — Page 5

Q58 jee_main_2024_31_jan_morning Bulk Modulus
The depth below the surface of sea to which a rubber ball be taken so as to decrease its volume by 0.02% is ________ m. (Take density of sea water = 10³ kgm⁻³, Bulk modulus of rubber = 9 × 10⁸ Nm⁻², and g = 10 ms⁻²)
Numerical Answer. Answer: 18 to 18

Solution

Related Formula
β = (-Δ P)/((Δ V)/(V)) Δ P = ρ g h
Core Logic

The change in pressure Δ P is the hydrostatic pressure at depth h.

Δ P = -β (Δ V)/(V) ρ g h = -β (Δ V)/(V)
Step 2: Calculation

Given values: ρ = 10³ kg/m³ g = 10 m/s² β = 9 × 10⁸ N/m² (Δ V)/(V) = -0.02% = -(0.02)/(100)

Substitute into the equation:

10³ × 10 × h = - (9 × 10⁸) × (-(0.02)/(100)) 10⁴ × h = 9 × 10⁸ × 2 × 10⁻⁴ 10⁴ h = 18 × 10⁴ h = 18 m
Chapter Mix

Class 11 Physics: Mechanical Properties Of Solids Class 11 Physics: Mechanical Properties Of Fluids

More Mechanical Properties of Solids Questions — jee_main_2025_24_jan_evening

Practice all Mechanical Properties of Solids previous-year questions →

Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)