NEET (UG)-2024 Physics Questions

Diamagnetic Materials

• Diamagnetic materials have a relative permeability (μr) less than 1, i.e., 0 ≤ μr < 1
• The susceptibility (χ) of diamagnetic materials is between -1 and 0, i.e., -1 ≤ χ < 0
• The magnetic permeability (μ) of diamagnetic materials is less than the permeability of free space (μ₀), i.e., μ < μ₀

Ideal Fluids and Bernoulli's Principle

• Bernoulli's principle states that the sum of kinetic energy per unit volume, potential energy per unit volume, and pressure is constant
• Mathematically, this is represented as: ½ ρV² + ρgh + P = constant
• Applying Bernoulli's principle to a non-uniform cross-sectional tube, the kinetic energy per unit volume at the narrower end (K₁) is greater than at the wider end (K₂), i.e., K₁ > K₂

Escape Velocity

• The escape velocity from a planet's surface is given by a specific formula
• The escape velocity is dependent on the mass and radius of the planet
• If a planet has 9 times the mass and 16 times the radius of Earth, its escape velocity is 3v/4, where v is the escape velocity from Earth