# CBSE Class 11 Physics Notes

Physics is a complex subject that requires a lot of conceptual, practical, and revision understanding. Therefore, we at GeeksforGeeks provide well-developed Class 11 Physics notes, that cover all the topics from scratch to hatch. Class 11 Physics notes contain 15 chapters covering topics like Measurement, Vectors, Kinematics, Dynamics, Rotational Motion, Laws of Motion, Gravitation, Elasticity, Hydrodynamics, Thermodynamics, Calorimetry, Oscillations, Waves and many more. Thus, we have covered them all chapterwise, with detailed explanations of concepts, examples, and solved problems on them.

**Chapter 1: Physical World**

The first chapter in Class 11 Physics is the Physical World. The physical world is referred to as the complexity in nature and solving its own complexities will give us new insights into this physical world. It is referred to as the analysis of nature conducted in order to understand how the world around us performs. We have covered some crucial topics like the relation of Physics with other sciences, Fundamental Forces of nature, and many more in the articles listed below:

**Chapter 2: Units and Measurement**

Units and Measurement is the second chapter in the Physics curriculum of Class 11, which is the most basic and crucial chapter because it works everywhere in Physics. Units and measurement which is given in the class 11 physics textbook offer basic knowledge about how the quantities are measured and the types of units that are used with them. Therefore, we have covered topics like System of units, error in measurements significant figure, dimensional analysis, etc are listed below:

- System of Units
- Length Measurement
- Measurement of Area, Volume and Density
- Rounding Numbers
- Dimensional Analysis
- Significant Figures
- Errors in Measurement

**Chapter 3: Motion in a Straight Line**

The third chapter is Motion in a straight line. This is the first chapter of kinematics in the Physics syllabus of Class 11. GeeksforGeeks Class 11 Physics Notes covers the essential terms related to kinematics like Motion in one dimension and important terms related to it, Rest and Motion, Position, distance, and placement, Difference between speed and velocity, etc along with solved conceptual and numerical problems on it.

- What is a Motion?
- Distance and Displacement
- Speed and Velocity
- What is Acceleration?
- Uniformly Accelerated Motion
- Problems on Equation of Motion
- Free Fall
- Problems Based on Free Fall
- Relative Motion
- Relative Motion in One Dimension
- Relative Motion in Two Dimension
- Stopping Distance and Reaction Time

**Chapter 4: Motion in a Plane**

The fourth chapter in Class 11 Physics is Motion in a Plane. Motion in a plane is the motion in 2 dimensions, for instance, projectile motion, circular motion, and so on. GeeksforGeeks Class 11 Physics Notes on Motion in a Plane cover the basics of motion in two dimensions, Scalar and vector – unit vector, parallel vectors, Addition, subtraction, and scalar multiplication of vectors, Average and instantaneous velocity, Position vector and displacement, Projectile motion and many more others that are listed below:

- Scalars and Vectors
- Vector Operations
- Product of Vectors
- Scalar Product of Two vectors
- Dot and Cross Products of Vectors
- Position and Displacement Vectors
- Average Velocity
- Motion in Two Dimension
- Relative Motion in Two Dimension
- Projectile Motion
- Uniform Circular Motion
- Centripetal Acceleration
- Motion of an object in Three dimensional Space

**Chapter 5: Laws of Motion**

Laws of motion is an important chapter of Class 11 Physics. In our crucial 11th Class Physics Notes, you will understand what is force and the laws of motion. The chapter covers the definition of force and basic forces, Newton’s law of motion, Linear momentum, Principle of conservation of momentum.

- Contact and Non-Contact Forces
- Inertia – Definition, Types, Sample Questions
- Newton’s First Law of Motion
- Impulse
- Solving Problems In Mechanics
- Linear Momentum of a System of Particles
- Newton’s Second Law of Motion
- Laws of Conservation of Momentum
- Equilibrium of a particle
- Newton’s Third Law of Motion
- What is Friction?
- Types of Friction
- Methods of Reducing Friction
- Factors Affecting Friction
- Motion Along a Rough Inclined Plane
- Problems on Friction Formula
- Difference between Centripetal and Centrifugal Force
- Dynamics of Circular Motion
- Problems on Dynamics of Circular Motion
- Motion in a Vertical Circle

**Chapter 6: Work, Energy and Power**

Chapter 6 in the Physics curriculum of Class 11 is Work energy and Power. This is one of the most important and basic that have many formulas and equations on Work, Power, and Energy. Work is said to be done when a force applied on the body displaces the body through a certain distance in the direction of the force. These topic-wise concepts in the Chapter Work, Energy and Power helps to understand the concept of Work and dimensions of the unit of work, different forms of energies like Potential Energy and Kinetic energy, and its relationship with momentum. Along with the most useful topics like Mass-energy relationships, Power, etc are discussed in a detailed manner in the articles listed below:

- Scalar Product of Vectors
- Work-Energy Theorem
- Introduction to Work
- Kinetic Energy
- Work Done by a Variable Force
- What is Potential Energy?
- Potential Energy of a Spring
- Problems on Potential Energy
- Forms of Energy and Law Conservation of Energy
- Difference between Work and Energy
- Power
- Types of Collisions
- Collisions in One Dimension
- Collisions in Two Dimensions
- Motion in a Vertical Circle

**Chapter 7: Systems of Particles and Rotational Motion**

Physics class 11 has a Seventh Chapter named Systems of Particles and Rotational Motion based on the Syllabus. GeeksforGeeks provide detailed knowledge of how the system of particles moves in our daily lives. The main focus is on the Topics like Kinematics of a system of particles, Various types of motions like translational motion, rotational motion, and rotational plus translational motion Rotational dynamics. This comprises of Newtons’ laws, the moment of inertia, and theorems related to these concepts, Angular momentum, impulse, etc are discussed in the following articles as mentioned below:

- Introduction to Rigid Body
- Motion of Rigid Body
- Centre of Mass
- Centre of Mass of Different Objects
- Motion of Centre of Mass
- Linear Momentum of a System of Particles
- Product of Vectors
- Torque and Angular Momentum
- Couple
- Principle of Moments
- Centre of Gravity
- Moment of Inertia
- Kinematics of Rotational Motion
- Dynamics of Rotational Motion
- Angular Momentum in Case of Rotation About a Fixed Axis
- Rolling Motion
- Angular Velocity and its Relation with Linear Velocity

**Chapter 8: Gravitation**

Gravitation is the Eighth Chapter in the Class 11 Physics Syllabus. In GeeksforGeeks Physics Notes, this Chapter contains the explanation on the topics like the law of gravitation given by Newton and many examples and problems that will clarify this law to the students. Topics Like Newton’s law of gravitation, Variation in g based on the distance of the object above the earth’s surface, Satellite – How a satellite is projected to form a circular orbit around a planet, Escape velocity, Period of revolution of a satellite is discussed in depth in the articles listed as:

- Kepler’s Laws of Planetary Motion
- Newton’s Law of Gravitation
- Factors affecting Acceleration due to Gravity
- Variation in Value of Acceleration due to Gravity
- Gravitational Potential Energy
- Escape Velocity
- Binding Energy and Satellites
- Weightlessness

**Chapter 9: Mechanical Properties of Solids**

The Chapter Ninth is Mechanical Properties of Solids in the Class 11 Physics. GeeksforGeeks crucial Physics notes for this chapter help students to understand how even rigid bodies can be bent and stretched by applying sufficient external force. As part of this chapter, learners may also learn about Deforming force, Elasticity, Stress, Perfect elastic body, Types of stress – Longitudinal, Tangential or shearing, Normal, Hooke’s law, etc as listed below:

- Elastic Behavior of Materials
- Elasticity and Plasticity
- Stress and Strain
- Hooke’s Law
- Stress-Strain Curve
- Young’s Modulus
- Shear Modulus and Bulk Modulus
- Poisson’s Ratio
- Elastic Potential Energy
- Stress, Strain and Elastic Potential energy

**Chapter 10: Mechanical Properties of Fluids**

Mechanical Properties of Fluids is the Tenth Chapter in Class 11 Physics. GeeksforGeeks Class 11 Notes of Physics Chapter 10 explain Pascal’s and Archimedes’ principles related to fluid dynamics. Here is a synopsis of what a learner may learn here in this chapter: Fluid mechanics – fluid pressure, atmospheric pressure, Pascal’s law, Archimedes Principle, Fluid dynamics – steady flow, line of flow, The velocity of Efflux, Bernoulli’s theorem, Viscosity, Stoke’s Law, etc.

- Fluid Pressure
- Problems on Pascal’s Law
- Variation of Pressure With Depth
- Devices to Measure Atmospheric Pressure
- Hydraulic Machines
- Streamline Flow
- Bernoulli’s Principle
- Bernoulli’s Equation
- Applications and Limitations of Bernoulli’s Law
- Viscosity
- Stoke’s Law
- Pascal’s Law
- Reynolds Number
- Surface Tension

**Chapter 11: Thermal Properties of Matter**

In Class 11, the Eleventh Chapter in Physics curriculum is the Thermal Properties of Matter. GeeksforGeeks’s important Class 11 Physics Notes of the matter’s thermal properties may take readers through a detailed course on heat and thermodynamics. A learner may learn about the rules and theorems like thermal properties of matter, temperature, heat, absolute temperature scale, and measurement of temperature, Thermal expansion, Heat transfer – Conduction, Convection, and Radiation, Newton’s law of cooling, etc are discussed in the articles listed below:

- Heat and Temperature
- Scales of Temperature
- Ideal Gas Equation and Absolute Temperature
- Thermal Expansion
- Heat Capacity
- Calorimetry
- Change of State of Matter
- Latent Heat
- Thermal Conduction
- Problems on Heat Conduction
- Convection
- Radiation
- Greenhouse Effect
- Newton’s Law of Cooling

**Chapter 12: Thermodynamics**

In GeeksforGeeks Class 11 Physics Notes of Chapter 12, students learned about the interrelation between heat and other forms of energy. It covers the key concepts like Thermal equilibrium, Heat, work, and internal energy, Important thermodynamic terms like static variables, equation of state, Quasi-static process, Isothermal process, the first law of thermodynamics, and its applications along with different Engines and Cycles as listed below:

- Introduction to Thermodynamics
- Zeroth Law of Thermodynamics
- Heat, Internal Energy and Work
- First Law of Thermodynamics
- Specific Heat Capacity
- Thermodynamic State Variables and Equation of State
- Thermodynamic Processes
- Second Law of Thermodynamics
- Reversible and Irreversible Process

**Chapter 13: Kinetic Theory**

Chapter 13 in Class 11 Physics Notes is Kinetic theory. The crucial Notes provided by GeeksforGeeks on kinetic theory teach students about important topics like the definition of kinetic theory, Molecular nature of matter, Dalton’s atomic theory, Avogadro’s law, Gay Lussac’s law, Molecular structure of solids, liquids, and gases. The behaviour of gases and the perfect gas equation, Deduction of Boyle’s and Charle’s Laws, Mean free path are also discussed in the articles listed below as:

- Kinetic Theory of Matter
- Molecular Nature of Matter
- Kinetic Theory of Gases
- Behaviour of Gas
- Ideal Gas equation and Absolute Temperature
- Specific Heat Capacity
- Mean Free Path

**Chapter 14: Oscillations**

Chapter 14 in Class 11 Physics Syllabus is Oscillations. Oscillation is the process of moving back and forth regularly. The Physics Class 11 Notes introduced by GeekssforGeeks teaches readers about what oscillation is and different types of oscillations. Students can learn the topics like oscillation and waves, Important terms related to oscillation like amplitude, period, acceleration, etc. The time of simple harmonic motion, Damped and forced oscillations are also discussed in these notes as listed below:

- Oscillatory and Periodic Motion
- Simple Harmonic Motion
- Force Law for Simple Harmonic Motion
- Uniform Circular Motion
- Displacement in SHM
- Velocity and Acceleration in SHM
- Force Law for SHM
- Energy in SHM
- Some Systems Executing SHM

**Chapter 15: Waves**

The last and fifteenth Chapter in Class 11 Physics is Waves. A wave is a disturbance that travels propagates and transports energy and momentum without the transport of matter. GeeksforGeeks Class 11 Physics Notes covers important topics like the concept of waves, reflection of waves, speed of waves, Principle of superposition of waves. Our Notes also contains solved conceptual questions on each of the topic listed below:

- Introduction to Waves
- Speed of a Travelling Wave
- Reflection of Waves
- Properties of Waves
- Principle of Superposition of Waves
- Energy in Wave Motion
- Doppler Effect