NEET UG 2026 Formulas Tips: Physics, Chemistry, Biology

Motion & Laws of Motion

• Speed = Distance / Time

• Acceleration = (v − u) / tv = u + at

• s = ut + ½at²

• v² = u² + 2as
  
  

NEET often combines two equations in one question. Always write given values first and check units before substitution.

Work, Energy & Power

• Work = Force × Displacement

• Kinetic Energy = ½mv²

• Potential Energy = mgh

• Power = Work / Time

For variable force, carefully analyse force-displacement graphs. Use energy conservation wherever possible to save time.

Gravitation

• F = Gm₁m₂ / r²

• Gravitational Potential Energy = −GMm / r

• Escape Velocity = √(2GM/R)

The negative sign in gravitational potential energy is a common NEET trap. Relate escape velocity with circular motion concepts.

Thermodynamics

• First Law: ΔQ = ΔU + W

• Isothermal Work: W = nRT ln(V₂/V₁)

• PV = nRT (Ideal Gas Law)

• ΔU = Q - W (First Law)

• RMS speed = √(3RT/M)

Understand P-V graphs for work calculation. Always identify the thermodynamic process first (isothermal, adiabatic, isobaric) before applying formulas.

Electrostatics & Current Electricity

• Coulomb’s Law: F = kq₁q₂ / r²

• Electric Field: E = F/q

• Ohm’s Law: V = IRP = VI = I²R = V²/R

• Capacitance C = Q/V

• Power = I²R or V²/R

Convert micro, milli, nano units properly and practice series-parallel circuits to avoid calculation mistakes.

Master series/parallel combinations and Kirchhoff's laws through circuit diagrams

Modern Physics

• E = mc²

• Photon Energy: E = hν

• Photoelectric Equation: hν = hν₀ + KE

• de Broglie Wavelength: λ = h/p

Modern Physics questions are direct and high-yield. Memorise constants and practice graph-based questions.

Mole Concept (Physical Chemistry)

• Number of moles = Given mass / Molar mass

• Molarity (M) = moles / volume (L)

• Molality (m) = moles / kg solvent

• Avogadro Number = 6.022 × 10²³

Always verify units (grams, kg, liters) before calculation. Dimensional analysis helps avoid silly mistakes.

Thermodynamics (Physical Chemistry)

• Gibbs Free Energy: ΔG = ΔH − TΔS

• ΔG° = −RT lnK

If ΔG < 0, the reaction is spontaneous. Focus on sign conventions for exothermic/ endothermic reactions

Chemical Kinetics (Physical Chemistry)

• Rate Law: Rate = k[A]ⁿ

• Half-life (First Order): t½ = 0.693 / k

Most NEET reactions are first order. Memorise this formula and practice graph-based questions.

Electrochemistry (Physical Chemistry)

• Nernst Equation:E = E° − (0.0591/n) log Q

The value 0.0591 is valid only at 25°C. NEET often tests this condition directly.

Memorise cell potentials and Faraday's laws for electrolysis numericals

Human Physiology (High Weightage)

• Cardiac cycle

• Nephron structure

• Hormones and their functions

Questions are often assertion - reason based. Focus on concept clarity and revise NCERT diagrams thoroughly.

Genetics & Evolution

• Mendel’s Ratios:

- Monohybrid - 3:1

- Dihybrid - 9:3:3:1

• Hardy–Weinberg Equation: p² + 2pq + q² = 1

Practice cross-based numerical questions regularly. Pay attention to exceptions and variations mentioned in NCERT.

Ecology & Environment

• 10% Law of Energy Transfer

• Population growth curves (J-shaped, S-shaped)

Questions are directly from NCERT. Revise definitions, examples, and diagrams before the exam.

Physics

• Motion & Laws of Motion

• Work, Energy & Power

• Gravitation

• Thermodynamics

• Electrostatics

• Current Electricity

• Modern Physics

Covers nearly 60 - 65% of Physics questions. Many problems are formula-based and scoring, if concepts are clear.

Chemistry

• Mole Concept

• Thermodynamics

• Chemical Kinetics

• Electrochemistry

• Organic Name Reactions

• Coordination Compounds

Physical Chemistry contributes to numerical questions, while Organic & Inorganic sections often have direct NCERT-based questions.

Biology

• Human Physiology

• Genetics & Evolution

• Ecology & Environment

• Biotechnology

Accounts for 70%+ of Biology questions. Most questions are NCERT-line based, factual, and diagram-oriented.