# New CBSE Physics Syllabus – Class XI | Theory & Practical

CBSE Physics Syllabus Class XI – Physics paper for Class XI incudes 2 sections – theory and practical. The theory section carries 70 marks and practical carries 30 marks. Here you can find the unit wise marks distribution for theory and the practical exams. You can also find the chapter wise syllabus of Physics Class XI theory and practical.

Physics unit wise marks distribution | Class XI Physics

 Units Chapter Marks Unit—I Physical World and Measurement 23 Chapter—1: Physical World Chapter—2: Units and Measurements Unit-II Kinematics Chapter—3: Motion in a Straight Line Chapter—4: Motion in a Plane Unit—III Laws of Motion Chapter—5: Laws of Motion Unit—IV Work, Energy and Power 17 Chapter—6: Work, Energy and Power Unit—V Motion of System of Particles and Rigid Body Chapter—7: System of Particles and Rotational Motion Unit-VI Gravitation Chapter—8: Gravitation Unit—VII Properties of Bulk Matter 20 Chapter—9: Mechanical Properties of Solids Chapter—10: Mechanical Properties of Fluids Chapter—11: Thermal Properties of Matter Unit-VIII Thermodynamics Chapter—12: Thermodynamics Unit—IX Behaviour of Perfect Gases and Kinetic Theory of Gases Chapter—13: Kinetic Theory Unit—X Oscillations and Waves 10 Chapter—14: Oscillations Chapter—15: Waves Total 70

## Theory – Physics Syllabus Class XI

Unit I: Physical World and Measurement

Chapter—1: Physical World – Physics-scope and excitement; nature of physical laws; Physics, technology and society.
Chapter—2: Units and Measurements – Need for measurement: Units of measurement; systems of units; SI units, fundamental and derived units. Length, mass and time measurements; accuracy and precision of measuring instruments; errors in measurement; significant figures. Dimensions of physical quantities, dimensional analysis and its applications.

Unit II: Kinematics

Chapter-3: Motion in a Straight Line – Frame of reference, Motion in a straight line: Position-time graph, speed and velocity.
Elementary concepts of differentiation and integration for describing motion, uniform and non- uniform motion, average speed and instantaneous velocity, uniformly accelerated motion, 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, relative velocity, Unit vector; resolution of a vector in a plane, rectangular components, Scalar and Vector product of vectors.
Motion in a plane, cases of uniform velocity and uniform acceleration- projectile motion, uniform circular motion.

Unit III: Laws of Motion

Chapter—5: Laws of Motion – Intuitive concept of force, Inertia, Newton’s first law of motion; momentum and Newton’s second law of motion; 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 IV: Work, Energy and Power

Chapter—6: Work, Engery and Power – Work done by a constant force and a variable force; kinetic energy, work- energy theorem, power. Notion of potential energy, potential energy of a spring, conservative forces: conservation of mechanical energy (kinetic and potential energies); non- conservative forces: motion in a vertical circle; elastic and inelastic collisions in one and two dimensions.

Unit V: 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 centre of mass motion. Centre of mass of a rigid body; centre of mass of a uniform rod. Moment of a 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 motions. Moment of inertia, radius of gyration, values of moments of inertia for simple geometrical objects (no derivation). Statement of parallel and perpendicular axes theorems and their applications.

Unit VI: Gravitation

Chapter—8: Gravitation – Kepler’s laws of planetary motion, universal law of gravitation. Acceleration due to gravity and its variation with altitude and depth. Gravitational potential energy and gravitational potential, escape velocity, orbital velocity of a satellite, Geo-stationary satellites.

Unit VII: Properties of Bulk Matter

Chapter—9: Mechanical Properties of Solids – Elastic behaviour, Stress-strain relationship, Hooke’s law, Young’s modulus, bulk modulus, shear modulus of rigidity, Poisson’s ratio; elastic energy.

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, Stokes’ law, terminal velocity, streamline and turbulent flow, critical velocity, Bernoulli’s theorem and its applications. Surface energy and surface tension, angle of contact, excess of 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; thermal expansion of solids, liquids and gases, anomalous expansion of water; specific heat capacity; Cp, Cv – calorimetry; change of state – latent heat capacity. Heat transfer-conduction, convection and radiation, thermal conductivity, qualitative ideas of Blackbody radiation, Wein’s displacement Law, Stefan’s law, Greenhouse effect.

Unit VIII: Thermodynamics
Chapter—12: Thermodynamics – Thermal equilibrium and definition of temperature (zeroth law of thermodynamics), heat, work and internal energy. First law of thermodynamics, isothermal and adiabatic processes. Second law of thermodynamics: reversible and irreversible processes, Heat engine and refrigerator.

Unit IX: Behaviour 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, concept of pressure. Kinetic interpretation of temperature; rms speed of gas molecules; degrees of freedom, law of equi-partition of energy (statement only) and application to specific heat capacities of gases; concept of mean free path, Avogadro’s number.

Unit X: Oscillations and Waves

Chapter—14: Oscillations Periodic motion – time 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 and force constant; energy in S.H.M. Kinetic and potential energies; simple pendulum derivation of expression for its time period. Free, forced and damped oscillations (qualitative ideas only), resonance.

Chapter—15: Waves
Wave motion: Transverse and longitudinal waves, speed of travelling wave, displacement relation for a progressive wave, principle of superposition of waves, reflection of waves, standing waves in strings and organ pipes, fundamental mode and harmonics, Beats, Doppler effect.

## Practical – Physics Syllabus Class XI

The record, to be submitted by the students, at the time of their annual examination, has to include:

• Record of at least 12 Experiments [with 6 from each section], to be performed by the students.
• Record of at least 6 Activities [with 3 each from section A and section B], to be performed by the students.
• Report of the project to be carried out by the students.

### Practical EVALUATION SCHEME

Time Allowed: Three hours, Max. Marks: 30

Physics unit wise marks distribution | Class XI Theory