CBSE Class 11 Physics Important Topics

Class 11 is one of the most important years in a student’s life. If you desire to do well in your CBSE Class 12 Board Examinations, you should focus on class 11 Physics Important topics. Physics is an important subject for board exams and other various competitive examinations like IIT JEE and NEET. Several popular competitive medical and engineering admission examinations include the Class 11 Physics syllabus. Students ought to understand physics ideas and apply them in the given context. It will help them strengthen their logical reasoning, as well as their analytical abilities. When preparing for the CBSE class 11 Physics exam, students need to be careful of these things. In addition to hard work, they must have a proper preparation strategy. The points listed below provide some preparation advice for CBSE class 11 Physics.

Important Topics of Physics Class 11

UNIT 1: Physical World and Measurement

Chapter 1: Physical World

• Nature of Physical Laws
• The international system of Units
• Fundamental forces in Nature

Chapter 2: Units and Measurements

• System of Units
• SI units; fundamental and derived units
• Length, mass, and time measurements
• Accuracy vs. Precision
• Errors in Measurement
• Significant Figures
• Dimensions of Physical quantities
• Dimensional analysis & its applications

UNIT 2: Kinematics

• Frame of reference
• Motion in a straight line: Position-time graph, speed, and velocity
• Elementary concepts of differentiation & integration of describing motion
• Uniform & non-uniform motion
• Average speed & Instantaneous velocity
• Uniformly accelerated motion
• Derivation of 3 equations of Motion (using calculus)
• Velocity-time and Position-time graphs
• Relations for uniformly accelerated motion (graphical treatment)

Chapter 4: Motion in a Plane

• Scalar and Vector quantities
• Position and Displacement Vectors
• General vectors and their notations
• Equality of vectors, multiplication of vectors by a real number; addition and subtraction of vectors
• Equation of path of the projectile (Derivation)
• Derivations of maximum height, time, and range related to projectile motion
• Derivations related to centrifugal force
• Relative velocity
• Unit Vector; resolution of vector in a plane, rectangular components
• Scalar and vector product of vectors
• Cases of uniform velocity and uniform acceleration-projectile motion
• Uniform circular motion (Numerical Problems are important)

UNIT 3: Laws of Motion

• >Inertia
• Newton’s First Law of Motion
• Momentum and Newton’s Second Law of Motion
• Concept of Impulse
• Newton’s Third Law of Motion
• Law of Conservation of Linear Momentum and its applications
• Equilibrium of concurrent forces
• Static and kinetic friction
• Laws of friction, rolling friction, lubrication
• Dynamics of uniform circular motion, centripetal force, examples of circular motion (vehicle on a level circular road, vehicle on a banked road)

UNIT 4: Work, Energy, and Power

• Work done by a constant force
• Work done by a variable force
• Kinetic Energy
• Work-energy theorem
• Power
• The notion of Potential energy
• The potential energy of a spring
• Conservative forces: Conservation of Mechanical Energy (Kinetic & Potential energies)
• Non-conservative forces
• Motion in a vertical circle
• Elastic and inelastic collisions in one and two dimensions

UNITS 5: Motion of System of Particles and Rigid Body

Chapter 7: System of Particles and Rotational Motion

• Centre of mass of a two-particle system
• Momentum conservation and center of a mass notion
• Centre of Mass of a Rigid body
• Centre of Mass of a Uniform Rod
• The momentum of force, Torque
• Angular Momentum
• Law of conservation of angular momentum and its applications
• Equilibrium of rigid bodies
• Rigid body rotation and equations of rotational motion, comparison of linear and rotational motion

UNIT 6: Gravitation

• Kepler’s laws of planetary motion
• The universal law of Gravitation
• Acceleration is due to gravity and its variation with altitude and depth (Derivation)
• Gravitational Potential Energy and gravitational potential
• Escape velocity, orbital velocity of Satellite
• Geo-stationary satellites

UNIT 7: Properties of Bulk Matter

Chapter 9: Mechanical Properties of Solids

• Elastic behavior
• Stress-strain relationship (Graph)
• Hooke’s Law
• Young’s modulus, Bulk modulus, shear modulus of Rigidity
• Poisson’s ratio
• Elastic potential energy (Derivation)

Chapter 10: Mechanical Properties of Fluids

• Pressure due to a fluid column
• Pascal’s law and its applications (hydraulic lift and hydraulic brakes)
• Effect of gravity on fluid pressure
• Viscosity
• Stoke’s law
• Terminal velocity
• Streamline and turbulent flow
• Critical velocity
• Bernoulli’s theorem and its applications
• Surface energy and surface tension
• Angle of contact
• Excess pressure across a curved surface
• Application of surface tension ideas to drops
• Bubbles and capillary rise

Chapter 11: Thermal Properties of Matter

• Heat & Temperature
• Thermal Expansion (Solids, liquids, and gases)
• Numerical based on Thermal Expansion
• Anomalous expansion of water
• Specific heat capacity; Cp, Cv
• Calorimetry
• Change of state – latent heat capacity
• Heat transfer – Conduction, Convection, Radiation
• Thermal conductivity
• Qualitative ideas of Blackbody Radiation
• Wein’s displacement law
• Stefan’s law
• Greenhouse effect

UNIT 8: Thermodynamics

• Thermal equilibrium and definition of temperature (zeroth law of thermodynamics)
• Heat, work, and internal energy
• Mayer’s formula (Cp-Cv=R)
• Performance of heat engine
• Performance of Carnot engine
• Carnot cycle & Carnot theorem
• The first law of Thermodynamics
• Isothermal and adiabatic processes
• The second law of Thermodynamics: reversible and irreversible processes
• Heat engine and refrigerator

UNIT 9: Behavior of Perfect Gases and Kinetic theory of Gases

Chapter 13: Kinetic Theory

• Equation of State of a Perfect gas
• Work done in compressing a gas
• Kinetic theory of gases – assumptions, the concept of pressure
• Kinetic interpretation of temperature
• RMS speed of molecules
• Degrees of Freedom
• Law of Equi-partition energy and application to specific heat capacities of gases
• Mean free path of gases
• Maxwell distribution of molecular speeds
• Concept of mean free path

UNIT 10: Oscillation and Waves

• Periodic Motion – Period, frequency
• Displacement as a function of time
• Periodic functions
• Simple Harmonic Motion (S.H.M) and its equation; Phase
• Oscillations of a loaded spring – restoring force, force constant
• Energy in S.H.M Kinetic and Potential energies
• Simple pendulum derivation of expression for its period
• Other important derivations for a Time period
• Free, forced, and damped oscillations
• Resonance

Chapter 15: Waves

• Wave Motion: Transverse and longitudinal waves
• Speed of traveling wave
• Newton’s formula for the speed of sound & Laplace correction
• Displacement relation for a progressive wave
• Principles of superposition of waves
• Reflection of waves
• Standing waves in strings and organ pipes
• Fundamental mode and harmonics
• Beats (Numerical Problems)
• Doppler effect (Numerical Problems)

FAQs on CBSE Class 11 Physics Important Topics

Is class 11 physics difficult in CBSE?

Class 11 physics in CBSE can be challenging, but with good study habits, it can be manageable.

Why is 11th physics so tough?

Class 11 physics can seem tough because it introduces new and complex concepts, but regular practice and seeking help when needed can make it easier.

How many books of physics are there in class 11 CBSE?

In CBSE class 11 physics, there are usually two main textbooks, one for theory and one for practicals.

What is the syllabus of 11th class physics 2023?

The syllabus for 11th class physics in 2023 follows the CBSE guidelines, covering topics like mechanics, waves, and thermodynamics.

How many chapters are there in class 11 physics?

Class 11 physics typically has around 10 to 15 chapters, depending on the specific curriculum and school.

How to pass in physics class 11?

To pass in class 11 physics, focus on regular study, understanding concepts, and practicing problems. Seek help from teachers or peers if needed.