Class 11 Physics Formulas: Chapter-Wise Formula Sheet for CBSE, JEE and NEET

Class 11 Physics formulas cover measurement, motion, force, energy, rotation, gravitation, matter, heat, gases, oscillations and waves. This formula sheet lists the main equations with their symbols, SI units and conditions of use. Physics formulas are easier to remember when you understand what they mean.

For example, (v=u+at) does not work for every type of motion. It applies when acceleration remains constant. In the same way, the simple pendulum formula works only for small oscillations.

Class 11 Physics Formula Chapter-Wise Overview

Download Class 11 Physics Formulas: Chapter-Wise Formula Sheet

Physics in Class 11 builds the foundation for every numerical you'll face in JEE and NEET, so a clean, accurate formula sheet matters more here than in almost any other subject. Below, each chapter opens with a short explanation of what it covers and why it matters for exams, followed by a clean table of formulas using proper mathematical notation (√, ², ³, π, Δ, →, θ, ω, etc.) instead of plain-text approximations.

Also Check: CBSE Class 11 Physics Syllabus

Chapter-Wise Class 11 Physics Formula

Chapter 1: Units and Measurements

This chapter teaches you how to report a measured quantity honestly — including how much uncertainty it carries — and how to check whether an equation even makes physical sense before you trust it. Errors and dimensional analysis questions are a guaranteed part of every CBSE and JEE Main paper, so this chapter punches well above its weight in terms of marks.

Dimensional analysis can confirm whether both sides of an equation match dimensionally, but it can never reveal pure numbers like 2, π, or ½ — keep that limitation in mind when you use it to "verify" a formula during revision.

Chapter 2: Motion in a Straight Line

One-dimensional kinematics is where most students either build strong fundamentals or pick up bad habits that haunt them in Motion in a Plane and Projectile Motion later. The equations of motion below only work under one condition: constant acceleration — a detail examiners love to test indirectly.

These four equations of motion are valid only when acceleration is constant throughout the motion — if a question mentions changing acceleration, switch to calculus-based definitions (v = dx/dt, a = dv/dt) instead.

Chapter 3: Motion in a Plane

This chapter extends one-dimensional ideas into two dimensions through vectors, projectile motion, and uniform circular motion — three of the highest-weightage topics in JEE and NEET mechanics. Most numerical errors here come from sign mistakes in vector components or forgetting that range and height formulas assume equal launch and landing elevation.

Projectile motion formulas assume air resistance is negligible, gravity is constant, and the object lands at the same height it was launched from — change any of these conditions and you must derive the result from first principles instead of plugging into R = u²sin(2θ)/g directly.

Chapter 4: Laws of Motion

Newton's three laws connect force, momentum, and motion, and this chapter is also where friction and circular motion on roads first appear — both frequent flyers in JEE Main and NEET. Pay close attention to when momentum conservation applies: only when the net external force on the system is zero.

Momentum conservation only holds for an isolated system with zero net external force — always check this condition before applying m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂ to a collision problem.

Chapter 5: Work, Energy and Power

This chapter ties force to energy transfer and introduces the work-energy theorem, one of the most efficient problem-solving shortcuts in all of mechanics. Collisions and the coefficient of restitution also live here, making this chapter essential for both conceptual MCQs and multi-step numericals in NEET and JEE.

The area under a force–displacement graph always equals the work done — a quick visual shortcut that saves time when a question gives you a graph instead of a clean F(x) expression. Perfectly elastic collisions have e = 1; perfectly inelastic collisions have e = 0.

Chapter 6: System of Particles and Rotational Motion

Rotational mechanics mirrors linear mechanics almost formula-for-formula — torque parallels force, angular momentum parallels linear momentum, and moment of inertia parallels mass. Once you see this symmetry, this chapter (a major JEE Advanced favorite) becomes far less intimidating.

Angular displacement θ must always be measured in radians, not degrees — plugging in degree values into s = rθ or any rotational kinematics equation is one of the most common silent errors in this chapter.

Chapter 7: Gravitation

Gravitation bridges everyday weight with planetary and satellite motion, making it a favorite chapter for conceptual NEET questions on escape velocity and orbital mechanics. The key skill here is knowing which approximation to use — exact inverse-square relations versus the simplified h ≪ R versions.

A satellite's total energy is always negative, E = −GMm/2r, which is exactly why it stays gravitationally bound in orbit instead of escaping — a conceptual point NEET often tests without requiring a single calculation.

Chapter 8: Mechanical Properties of Solids

Elasticity questions test whether you can connect stress, strain, and the three elastic moduli to real material behavior — a topic that shows up reliably in CBSE board papers and occasionally in JEE Main as assertion-reason questions. Reading a stress-strain graph correctly is just as important as memorizing the formulas.

The negative sign in B = −ΔP/(ΔV/V) simply reflects that volume shrinks when pressure increases; bulk modulus itself is always reported as a positive quantity.

Chapter 9: Mechanical Properties of Fluids

Fluid mechanics covers pressure, buoyancy, flow, viscosity, and surface tension — a chapter where Bernoulli's equation and Stokes' law together account for a large share of JEE and NEET fluid-based numericals. Always verify whether a question's flow is steady, non-viscous, and incompressible before applying Bernoulli's equation.

Notice the soap bubble has double the excess pressure of a liquid drop (4S/r vs 2S/r) because a bubble has two liquid surfaces, not one — a distinction examiners frequently test by swapping the two formulas in MCQs.

Chapter 10: Thermal Properties of Matter

This chapter covers how matter expands, stores heat, and radiates energy — calorimetry numericals and Stefan-Boltzmann questions are staples of both CBSE boards and NEET. The single most common error here is forgetting to convert Celsius to kelvin before using a formula that requires absolute temperature.

Always use kelvin (not Celsius) in gas laws, kinetic theory, radiation formulas, and any equation involving T_K⁴ — using Celsius here is one of the most frequent silent calculation errors students make under exam pressure.

Chapter 11: Thermodynamics

Thermodynamics formalizes the relationship between heat, work, and internal energy through the first law, and process-specific formulas (isothermal, adiabatic, isobaric, isochoric) are a JEE Main and NEET staple. Before applying any formula, lock down the sign convention the question uses for Q, W, and ΔU.

The area enclosed under a pressure–volume curve always represents the work done in that process — a graphical shortcut that's invaluable for cyclic process questions where setting up integrals directly would waste time.

Chapter 12: Kinetic Theory

Kinetic theory connects the microscopic motion of gas molecules to the macroscopic quantities of pressure and temperature, explaining why PV = nRT_K works the way it does. Degrees of freedom and the relation γ = (f_d + 2)/f_d are frequently tested for monoatomic, diatomic, and polyatomic gases in JEE.

A monoatomic gas has f_d = 3, giving γ = 5/3, while a diatomic gas typically has f_d = 5, giving γ = 7/5 — memorizing these two reference values lets you sanity-check almost any kinetic theory numerical instantly.

Chapter 13: Oscillations

Simple harmonic motion is the gateway to wave physics, and SHM-based numericals consistently appear across CBSE, JEE, and NEET because they blend kinematics, dynamics, and energy concepts in one tidy package. Pay attention to the phase angle φ — it's the detail most students skip and the one examiners exploit.

The total mechanical energy in SHM, E = ½mω²A², stays constant only in the absence of damping — the moment friction or air resistance enters the picture, this conservation law no longer applies and amplitude decays over time.

Class 11 Physics Chapter 14: Waves

Wave motion ties together oscillations, sound, and resonance in strings and pipes — and standing wave patterns in organ pipes are one of the most reliably tested numerical setups in NEET Physics. The key distinction to nail down is open versus closed organ pipes, since closed pipes support only odd harmonics.

Class 11 Physics formulas cover measurement, motion, force, energy, rotation, gravitation, fluids, heat, gases, oscillations and waves. Do not try to memorise the complete list in one sitting. Study one chapter at a time. Understand each symbol, note the formula conditions and solve questions after revision. This approach will help you use formulas correctly in CBSE school examinations, JEE and NEET.