Important Questions for CBSE Class 11 Physics
Class 11 Physics lays the foundation for every concept used in Class 12, JEE, NEET, and other competitive exams built on mechanics, thermodynamics, and oscillations. Practising important questions for CBSE Class 11 Physics, chapter by chapter, helps you identify high-weightage topics, understand how numerical and theory questions are framed, and build the problem-solving speed that board exams and entrance tests demand. This important questions for the Class 11 brings together chapter-wise important questions, must-know formulas, and key concepts for CBSE Class 11 Physics in one simple, exam-focused resource curated by MyClass24.
Chapter-wise PDF of Important Questions for CBSE Class 11 Physics
Why Practising Important Questions Matters for Class 11 Physics
CBSE Class 11 Physics blends conceptual reasoning with mathematical application. Many students read a chapter, feel confident, and then struggle when a numerical from Laws of Motion or Gravitation is framed differently in the exam. Solving important questions for Class 11 Physics regularly trains you to recognise question patterns, apply the correct formula quickly, and avoid careless calculation mistakes. It also helps you revise faster before unit tests, half-yearly exams, and the final board exam, since you are practising the exact type of questions examiners repeat year after year across CBSE papers and sample papers.
Chapter-Wise Important Questions for CBSE Class 11 Physics
Here is a chapter-wise list of topics from which important questions are most frequently asked in CBSE Class 11 Physics. Use it as a checklist while revising each unit.
Unit 1: Physical World and Measurement
Dimensional analysis and checking the correctness of physical equations
Errors in measurement: absolute, relative, and percentage error
Significant figures and rules for rounding off in calculations
Unit 2: Kinematics
Derivation of equations of motion using calculus
Relative velocity in one and two dimensions
Projectile motion: time of flight, maximum height, and range
Uniform circular motion and centripetal acceleration
Unit 3: Laws of Motion
Newton's second law applied to connected bodies and pulley systems
Friction: static, kinetic, and motion on an inclined plane
Circular motion on a banked road and conical pendulum problems
Unit 4: Work, Energy and Power
Work-energy theorem and its application to variable forces
Conservation of mechanical energy in different situations
Elastic and inelastic collisions in one and two dimensions
Unit 5: Motion of System of Particles and Rigid Body
Centre of mass of a system of particles and rigid bodies
Torque, angular momentum, and their conservation
Moment of inertia of standard bodies; parallel and perpendicular axes theorems
Unit 6: Gravitation
Kepler's laws and derivation of orbital velocity
Variation of acceleration due to gravity with height and depth
Escape velocity and gravitational potential energy
Unit 7: Properties of Bulk Matter
Stress-strain curve and Hooke's law numericals
Bernoulli's theorem and its practical applications
Surface tension, viscosity, and Stokes' law problems
Heat transfer by conduction, convection, and radiation
Unit 8: Thermodynamics
First law of thermodynamics and sign conventions
Isothermal and adiabatic processes with work done derivations
Efficiency of a Carnot engine and the second law of thermodynamics
Unit 9: Behaviour of Perfect Gas and Kinetic Theory
Kinetic theory postulates and derivation of pressure of a gas
Degrees of freedom and the law of equipartition of energy
Mean free path and rms speed of gas molecules
Unit 10: Oscillations and Waves
Simple harmonic motion: displacement, velocity, and acceleration equations
Energy in SHM and the simple pendulum
Wave motion, superposition, and standing waves on a string
Beats and the Doppler effect for sound
Important Formulas for CBSE Class 11 Physics
These formulas cover the most frequently tested concepts across Class 11 Physics chapters. The table below is designed to be easy to scan on mobile while revising.
Chapter / Topic | Formula | Terms Used |
Equations of Motion | v = u + at ; s = ut + ½at² ; v² = u² + 2as | u, v = initial & final velocity; a = acceleration; t = time; s = displacement |
Projectile Motion | R = u²sin2θ/g ; H = u²sin²θ/2g | R = range; H = max height; θ = angle of projection |
Newton's Second Law | F = ma | F = net force; m = mass; a = acceleration |
Friction | f = μN | f = friction force; μ = coefficient of friction; N = normal reaction |
Work Done | W = F·s·cosθ | F = force; s = displacement; θ = angle between F and s |
Kinetic & Potential Energy | KE = ½mv² ; PE = mgh | m = mass; v = velocity; h = height; g = 9.8 m/s² |
Power | P = W/t | W = work done; t = time taken |
Centre of Mass | X_cm = Σmᵢxᵢ / Σmᵢ | mᵢ = mass of particle; xᵢ = its position |
Torque & Angular Momentum | τ = Iα ; L = Iω | I = moment of inertia; α = angular acceleration; ω = angular velocity |
Newton's Law of Gravitation | F = Gm₁m₂/r² | G = 6.67×10⁻¹¹ Nm²/kg²; r = distance between masses |
Escape Velocity | v_e = √(2gR) | g = acceleration due to gravity; R = radius of the planet |
Stress and Strain | Stress = F/A ; Y = Stress/Strain | F = force; A = area; Y = Young's modulus |
Bernoulli's Theorem | P + ½ρv² + ρgh = constant | P = pressure; ρ = density; v = velocity; h = height |
First Law of Thermodynamics | ΔQ = ΔU + ΔW | ΔQ = heat supplied; ΔU = change in internal energy; ΔW = work done |
Ideal Gas Equation | PV = nRT | P = pressure; V = volume; n = moles; R = gas constant; T = temperature |
Simple Harmonic Motion | x = A sin(ωt + φ) ; T = 2π√(m/k) | A = amplitude; ω = angular frequency; T = time period; k = spring constant |
Simple Pendulum | T = 2π√(L/g) | L = length of pendulum; g = acceleration due to gravity |
Wave Speed | v = fλ | f = frequency; λ = wavelength |
Key Concepts to Revise Before the Exam
Along with formulas, examiners often test conceptual understanding through assertion-reason and short-answer questions. Keep these core ideas clear.
Concept | What to Remember |
Dimensional Formula | Used to check equation consistency and derive relations between physical quantities |
Vectors vs Scalars | Vectors have magnitude and direction (velocity, force); scalars have only magnitude (mass, speed) |
Conservation of Momentum | Total momentum of an isolated system stays constant when no external force acts |
Moment of Inertia | Depends on mass distribution about the axis; larger when mass lies farther from the axis |
Elastic Limit | Maximum stress a material can bear and still return to its original shape |
Degrees of Freedom | Monatomic gas: 3; Diatomic gas: 5 (at moderate temperature); affects specific heat values |
Resonance | Occurs when the frequency of an external force matches the natural frequency of a system |
Smart Preparation Tips for Class 11 Physics Important Questions
Start each chapter by listing its derivations, since CBSE frequently sets 3 to 5 mark questions asking you to derive a formula from first principles
Solve numericals from NCERT exemplar problems after finishing textbook exercises, as board papers often mirror the exemplar's difficulty level
Maintain a single formula notebook chapter-wise and revise it a day before every test instead of flipping through the entire textbook
Practise diagram-based questions from Motion of System of Particles and Waves, since labelled diagrams often carry separate marks
Time yourself while solving previous years' important questions to build the speed needed for a three-hour board paper
Revisit topics with common misconceptions, such as the difference between speed and velocity or between heat and temperature, since CBSE frequently tests these through conceptual MCQs
How MyClass24 Supports Your Class 11 Physics Preparation
MyClass24 curates chapter-wise important questions, solved numericals, and revision notes for CBSE Class 11 Physics so that students can prepare in a structured, exam-oriented way rather than searching across multiple sources. Whether you are revising Laws of Motion before a unit test or brushing up on Thermodynamics before the board exam, MyClass24's resources are organised to match the CBSE syllabus and marking pattern, helping you spend more time practising and less time hunting for the right question bank.
Bookmark this page and return to it through each term to track which chapters you have covered. Consistent practice of important questions for CBSE Class 11 Physics, paired with a firm grip on formulas and core concepts, is one of the most reliable ways to score well in both school exams and future competitive tests.