Home CBSE Syllabus Physics Class XI Syllabus

# Physics Class XI Syllabus

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### ExamÂ Structure

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

### Unit I: Physical World and Measurement

Chapterâ€“1: Physical World

Physics – scope and excitement; nature of physical laws; Physics, technology and society.

Chapterâ€“2: Units and Measurements

Need for measurement: Units of measurement; systems of units; SI units, fundamental and derivedÂ units. Length, mass and time measurements; accuracy and precision of measuring instruments; errorsÂ in measurement; significant figures.

Dimensions of physical quantities, dimensional analysis and its applications.

### Unit II: Kinematics

Chapterâ€“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, velocityÂ time and position-time graphs.

Relations for uniformly accelerated motion (graphical treatment).

Chapterâ€“4: Motion in a Plane

Scalar and vector quantities; Position and displacement vectors, general vectors and their notations;Â equality of vectors, multiplication of vectors by a real number; addition and subtraction ofÂ vectors. Relative velocity. Unit vector; Resolution of a vector in a plane – rectangular components. ScalarÂ and Vector product of vectors.

Motion in a plane, cases of uniform velocity and uniform acceleration-projectile motion. UniformÂ circular motion.

### Unit III: Laws of Motion

Chapterâ€“5: Laws of Motion

Intuitive concept of force. Inertia, Newton’s first law of motion; momentum and Newton’s secondÂ 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,Â lubrication.

Dynamics of uniform circular motion: Centripetal force, examples of circular motion (vehicle on aÂ level circular road, vehicle on banked road).

### Unit IV: Work, Energy and Power

Chapterâ€“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 ofÂ mechanical energy (kinetic and potential energies); non-conservative forces: motion in a verticalÂ circle; elastic and inelastic collisions in one and two dimensions.

### Unit V: Motion of System of Particles and Rigid Body

Chapterâ€“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, laws of conservation of angular momentum and itsÂ applications.

Equilibrium of rigid bodies, rigid body rotation and equations of rotational motion, comparison ofÂ linear and rotational motions.

Moment of inertia, radius of gyration.Values of moments of inertia, for simple geometrical objectsÂ (no derivation). Statement of parallel and perpendicular axes theorems and their applications.

### Unit VI: Gravitation

Chapterâ€“8: Gravitation

Keplar’s laws of planetary motion.The 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 aÂ satellite. Geo-stationary satellites.

### Unit VII: Properties of Bulk Matter

Chapterâ€“9: Mechanical Properties of Solids

Elastic behaviour, Stress-strain relationship, Hooke’s law, Young’s modulus, bulk modulus, shearÂ modulus of rigidity, Poisson’s ratio; elastic energy.

Chapterâ€“10: Mechanical Properties of Fluids

Pressure due to a fluid column; Pascal’s law and its applications (hydraulic lift and hydraulic brakes).Â Effect of gravity on fluid pressure.

Viscosity, Stokes’ law, terminal velocity, streamline and turbulent flow, critical velocity.Bernoulli’sÂ theorem and its applications.

Surface energy and surface tension, angle of contact, excess of pressure across a curved surface,Â application of surface tension ideas to drops, bubbles and capillary rise.

Chapterâ€“11: Thermal Properties of Matter

Heat, temperature, thermal expansion; thermal expansion of solids, liquids and gases, anomalousÂ 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 ofÂ Blackbody radiation, Wein’s displacement Law, Stefan’s law, Green house effect.

### Unit VIII: Thermodynamics

Chapterâ€“12: Thermodynamics

Thermal equilibrium and definition of temperature (zeroth law of thermodynamics).Heat, work andÂ 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

Chapterâ€“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; rmsÂ speed of gas molecules; degrees of freedom, law of equi-partition of energy (statement only) andÂ application to specific heat capacities of gases; concept of mean free path, Avogadro’s number.

### Unit X: Oscillations and Waves

Chapterâ€“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 spring-restoring force andÂ force constant; energy in S.H.M. Kinetic and potential energies; simple pendulum derivation ofÂ expression for its time period.

Free, forced and damped oscillations (qualitative ideas only), resonance.

Chapterâ€“15: Waves

Wave motion. Transverse and longitudinal waves, speed of wave motion. Displacement relation for aÂ progressive wave. Principle of superposition of waves, reflection of waves, standing waves in stringsÂ and organ pipes, fundamental mode and harmonics, Beats, Doppler effect.

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