# JEE Main Physics Syllabus 2021 With Weightage

Get Syllabus of JEE Main for Physics

By Mohit ChauhanUpdated : Feb 4, 2021 , 13:59 IST The JEE Main syllabus consists of topics majorly from Class 10 and Class 12 syllabus as prescribed by the CBSE. Thus, you will be required to refer to the Physics syllabus of JEE Main for preparing for the JEE Main exam 2021. You can also download the PDF of the Physics syllabus of JEE Main at the end of the page.

All the aspirants appearing for JEE Main exam this year are already familiar with the 2020 physics syllabus. So, now we are sharing the expected JEE 2021 physics syllabus which carries a total weight-age of 33.3% i.e., (120 Marks) in the JEE Main 2021 exam. Here you will also find the best books for JEE Main Physics and preparation strategies for Physics subject.

## JEE Main 2021- Physics Syllabus

Being one of the scoring subjects, Physics is the subject that explains all the movement of fundamental particles to the concept of the Big Bang. You need to make your concepts clear for the subject for scoring well in the Physics section of JEE Main paper. Further, the syllabus of Physics is divided into five major parts:

• Mechanics
• Electrostatics and Magnetism
• Optics and Modern Physics
• Heat and Thermodynamic
• Current Electricity and Electromagnetic Induction

### JEE Main Physics Chapter-Wise Weightage

Weightage of the topic help you in getting the important topics for the exam. JEE Main question paper for Physics is prepared using the weightage of the topic. Take a look at the Physics syllabus with weightage below:

 Topics from Class 11 Weightage (in percentage) Topics from Class 12 Weightage (in percentage) Kinematics 1.67 Moving Charges and Magnetism 6.33 Laws of Motion 2.67 Electric Charges and Fields 3.67 Rotational Motion 6.33 Current Electricity 4.67 Units and Dimensions 5.33 Electric Potential and Capacitance 3.33 Work, Energy and Power 3.67 Alternating Current 1.67 Waves 5.0 Ray Optics 5.67 Thermal Properties 0.67 Semiconductors 10.67 Oscillations 3.67 Dual Nature of Radiation 4.33 Thermodynamics 6.33 Wave Optics 4.67 Kinetic Theory of Gases 2.67 Electromagnetic Waves and Communication Systems 3.33 Mechanics of Solids and Fluids 2.7 Atoms and Nuclei 2.3 Gravity 3.3 Magnetism and Matter 1.0 Electromagnetic Induction 3.0

Check the chapter-wise JEE Main Physics Syllabus, which is explained in detail.

### Physics- Important Topics of Mechanics

UNIT 1: Physics and Measurement

• Physics, technology, and society, SI units, Fundamental and derived units
• Least count, accuracy, and precision of measuring instruments, Errors in measurement, Significant figures
• Dimensions of Physical quantities, dimensional analysis, and its applications

UNIT 2: Kinematics

• Frame of reference
• Motion in a straight line: Position-time graph, speed, and velocity
• Uniform and non-uniform motion, average speed and instantaneous velocity Uniformly accelerated motion, velocity-time, position-time graphs, relations for uniformly accelerated motion
• Scalars and Vectors, Vector Addition and Subtraction, Zero Vector, Scalar and Vector products, Unit Vector, Resolution of a Vector
• Relative Velocity, Motion in a plane, Projectile Motion, Uniform Circular Motion

UNIT 3: Laws of Motion

• Force and Inertia, Newton’s First Law of motion Momentum, 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
• Dynamics of uniform circular motion: Centripetal force and its applications.

UNIT 4: Work, Energy and Power

• Work done by a constant force and a variable force
• Kinetic and potential energies, work-energy theorem, power
• Potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces
• Elastic and inelastic collisions in one and two dimensions

UNIT 5: Rotational Motion

• Centre of mass of a two-particle system, Centre of mass of a rigid body
• Basic concepts of rotational motion
• Moment of a force, torque, angular momentum, conservation of angular momentum and its applications
• Moment of inertia, radius of gyration
• Values of moments of inertia for simple geometrical objects, parallel and perpendicular axes theorems and their applications
• Rigid body rotation, equations of rotational motion

UNIT 6: Gravitation

• The universal law of gravitation
• Acceleration due to gravity and its variation with altitude and depth
• Kepler’s laws of planetary motion
• Gravitational potential energy
• Gravitational potential
• Escape velocity
• Orbital velocity of a satellite
• Geo-stationary satellites

UNIT 7: Properties of Solids and Liquids

• Elastic behaviour, Stress-strain relationship, Hooke’s Law, Young’s modulus, bulk modulus, modulus of rigidity
• Pressure due to a fluid column
• Pascal’s law and its applications
• Viscosity, Stokes’ law, terminal velocity, streamline and turbulent flow, Reynolds number
• Bernoulli’s principle and its applications
• Surface energy and surface tension, angle of contact, application of surface tension - drops, bubbles and capillary rise

UNIT 8: Oscillations 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 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, resonance
• Wave motion
• Longitudinal and transverse waves, the speed of a wave
• Displacement relation for a progressive wave
• The principle of superposition of waves, reflection of waves, Standing waves in strings and organ pipes, fundamental mode and harmonics, Beats, Doppler effect in sound
• Chapters Come Under Mechanics for JEE Main

### Physics- Important Topics of Heat and Thermodynamics

UNIT 9: Thermal Properties of Matter

• Heat, temperature, thermal expansion
• Specific heat capacity, calorimetry
• Change of state, latent heat
• Heat transfer- conduction, convection and radiation, Newton’s law of cooling

UNIT 10: Thermodynamics

• Thermal equilibrium, the zeroth law of thermodynamics, concept of temperature
• Heat, work and internal energy. First law of thermodynamics
• Second law of thermodynamics: reversible and irreversible processes
• Carnot engine and its efficiency

UNIT 11: Kinetic Theory of Gases

• Equation of state of a perfect gas, work done on compressing a gas
• Kinetic theory of gases - assumptions, concept of pressure
• Kinetic energy and temperature: rms speed of gas molecules
• Degrees of freedom, Law of equipartition of energy, applications to specific heat capacities of gases
• Mean free path, Avogadro’s number

### Physics- Important Topics of Electrostatics & Electromagnetism

UNIT 12: Electrostatics

• Electric charges: Conservation of charge, Coulomb’s law-forces between two point charges, forces between multiple charges
• Superposition principle and continuous charge distribution
• Electric field: Electric field due to a point charge, Electric field lines, Electric dipole, Electric field due to a dipole, Torque on a dipole in a uniform electric field
• Electric flux, Gauss’s law and its applications to find field due to infinitely long uniformly charged straight wire, uniformly charged infinite plane sheet and uniformly charged thin spherical shell
• Electric potential and its calculation for a point charge, electric dipole and system of charges
• Equipotential surfaces, Electrical potential energy of a system of two point charges in an electrostatic field
• Conductors and insulators, Dielectrics and electric polarization, capacitor, combination of capacitors in series and in parallel, capacitance of a parallel plate capacitor with and without dielectric medium between the plates, Energy stored in a capacitor.

UNIT 13: Magnetism of Moving Charges and Magnetic Properties of Matter

• Biot - Savart law and its application to current carrying circular loop
• Ampere’s law and its applications to infinitely long current carrying straight wire and solenoid
• Force on a moving charge in a uniform magnetic and electric fields
• Cyclotron
• Force on a current-carrying conductor in a uniform magnetic field
• Force between two parallel current-carrying conductors-definition of ampere
• Torque experienced by a current loop in uniform magnetic field
• Moving coil galvanometer, its current sensitivity and conversion to ammeter and voltmeter.
• Current loop as a magnetic dipole and its magnetic dipole moment
• Bar magnet as an equivalent solenoid, magnetic field lines
• Earth’s magnetic field and magnetic elements
• Para-, dia- and ferro- magnetic substances
• Magnetic susceptibility and permeability, Hysteresis, Electromagnets and permanent magnets

UNIT 14: Electromagnetic Waves

• Electromagnetic waves and their characteristics
• Transverse nature of electromagnetic waves
• Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet, X rays, gamma rays)
• Applications of e.m. waves

### Physics- Important Topics of Current Electricity and EMI

UNIT 15: Current Electricity

• Electric current, Drift velocity, Ohm’s law, Electrical resistance, resistance of different materials, V-I characteristics of Ohmic and non ohmic conductors, Electrical energy and power, Electrical resistivity, Colour code for resistors
• Series and parallel combinations of resistors
• Temperature dependence of resistance
• Electric Cell and its Internal resistance, potential difference and emf of a cell, combination of cells in series and in parallel
• Kirchhoff’s laws and their applications
• Wheatstone bridge, Metre bridge
• Potentiometer - principle and its applications

UNIT 16: Electromagnetic Induction

• Electromagnetic induction
• Faraday’s law, induced emf and current
• Lenz’s Law, Eddy currents
• Self and mutual inductance

UNIT 17: Alternating Currents

• Alternating currents, peak and rms value of alternating current/ voltage
• Reactance and impedance
• LCR series circuit, resonance
• Quality factor, power in AC circuits, wattless current
• AC generator and transformer

UNIT 18: Semiconductors and Electronic Devices

• Semiconductors
• Semiconductor diode: I-V characteristics in forward and reverse bias
• Diode as a rectifier
• I-V characteristics of LED, photodiode, solar cell and Zener diode
• Zener diode as a voltage regulator
• Junction transistor, transistor action, characteristics of a transistor
• Transistor as an amplifier (common emitter configuration) and oscillator
• Logic gates (OR, AND, NOT, NAND and NOR)
• Transistor as a switch

### Physics- Important Topics of Optics & Modern Physics

UNIT 19: Optics

Ray Optics:

1. Reflection and refraction of light at plane and spherical surfaces
2. Mirror formula
3. Total internal reflection and its applications
4. Deviation and Dispersion of light by a prism
5. Lens Formula
6. Magnification
7. Power of a Lens
8. Combination of thin lenses in contact
9. Microscope and Astronomical Telescope (reflecting and refracting) and their magnifying powers

Wave optics:

1. Wavefront and Huygens’ principle
2. Laws of reflection and refraction using Huygens principle
3. Interference
4. Young’s double slit experiment and expression for fringe width
5. Coherent sources and sustained interference of light
6. Diffraction due to a single slit, width of central maximum
7. Resolving power of microscopes and astronomical telescopes, Polarisation, plane polarized light
8. Brewster’s law, uses of plane polarized light and Polaroids.

UNIT 20: Dual Nature of Matter and Radiation

• Photoelectric effect, Hertz and Lenard’s observations
• Einstein’s photoelectric equation
• Particle nature of light
• Matter waves-wave nature of particle, de Broglie relation
• Davisson-Germer experiment

UNIT 21: Atoms and Nuclei

• Alpha-particle scattering experiment
• Rutherford’s model of atom
• Bohr model, energy levels, hydrogen spectrum
• Composition and size of nucleus, atomic masses, isotopes, isobars
• Isotones
• Radioactivity-alpha, beta and gamma particles/rays and their properties
• Mass-energy relation, mass defect
• Binding energy per nucleon and its variation with mass number, nuclear fission and fusion.

UNIT 22: Communication Systems

• Propagation of electromagnetic waves in the atmosphere and space wave propagation
• Need for modulation, Amplitude and Frequency Modulation, Bandwidth of signals, Bandwidth of Transmission medium, Basic Elements of a Communication System (Block Diagram only)

### JEE Main Physics Practicals Syllabus

UNIT 23: Experimental Skills

• Familiarity with the basic approach and observations of the experiments and activities:
• Vernier callipers - its use to measure internal and external diameter and depth of a vessel.
• Screw gauge-its use to determine thickness/diameter of thin sheet/wire.
• Simple Pendulum-dissipation of energy by plotting a graph between square of amplitude and time.
• Metre Scale - mass of a given object by principle of moments.
• Young’s modulus of elasticity of the material of a metallic wire.
• Surface tension of water by capillary rise and effect of detergents.
• Coefficient of Viscosity of a given viscous liquid by measuring terminal velocity of a given spherical body.
• Plotting a cooling curve for the relationship between the temperature of a hot body and time.
• Speed of sound in air at room temperature using a resonance tube.
• Specific heat capacity of a given (i) solid and (ii) liquid by method of mixtures.
• Resistivity of the material of a given wire using metre bridge.
• Resistance of a given wire using Ohm’s law.
• Potentiometer
• Comparison of emf of two primary cells.
• Determination of internal resistance of a cell.
• Resistance and figure of merit of a galvanometer by half deflection method.
• Focal length of: (i) Convex mirror (ii) Concave mirror, and (iii) Convex lens using parallax method.
• Plot of angle of deviation vs angle of incidence for a triangular prism.
• Refractive index of a glass slab using a traveling microscope.
• Characteristic curves of a p-n junction diode in forward and reverse bias.
• Characteristic curves of a Zener diode and finding reverse breakdown voltage.
• Characteristic curves of a transistor and finding current gain and voltage gain.
• Identification of Diode, LED, Transistor, IC, Resistor, Capacitor from mixed collection of such items.
• Using multimeter to:

(i) Identify base of a transistor

(ii) Distinguish between NPN and PNP type transistor

(iii) See the unidirectional flow of current in case of a diode and an LED

(iv) Check the correctness or otherwise of a given electronic component (diode, transistor or IC).

## Best Books for JEE Main Physics

We will suggest you not to spend your time reading too many books. Just keep with you some important books that will help you in getting the exact pattern, relevant content, well-planned study strategy and some useful tricks. Some of the recommended books for Physics are as follows:

 Books Authors Concepts of Physics (volumes 1 and 2) H.C Verma Guide to AIEEEProblems in General Physics G. K PublishersI.E Irodov D.C Pandey (Complete Set) Arihant. Problems in Physics S. S Krotov Solved Papers and 8 Practice sets GGSIPU engineering entrance exam

## Preparation Tips for JEE Main Physics 2021

• Solve previous year question paper- After completing your syllabus, you should be more inclined towards solving the previous year questions papers. This platform not only provides you with enough practice but also deliver an idea of what to expect in the JEE Main exam.
• Importance of short notes, flashcards and shortcuts-You must make your own JEE Main Physics notes as you go through with each topic of the subject. Mug up the important formulas as this will help you in reaching your answer quickly. Notes serve as a good method during the revision of the exam.
• Stay focused and relaxed- It is suggested to complete a topic and take a short break. You should also invest some time in relaxing yourself. Do some activity that will motivate and keep you focused as well.
• Basic rule to get the right answer- Adopt this elimination process by removing the options which you feel can’t be right for sure. Try to solve the easiest question first in the limited time frame. It is advised to leave a question if you are not able to get the answer and move to the next one.
• Tips to Remember-Start your preparation for the Physics with NCERT books and make your concepts strong. Do a lot of practice and mock tests in order to enhance your chances of scoring well. Do not involve yourself in guesswork and be positive and calm to get success in JEE Main 2020.

The JEE Main Physics Syllabus PDF is given below. You can download the PDF from the link beneath:

### JEE Main Physics Syllabus 2021 PDF

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In-depth preparation of all the topics followed up with topic-wise tests and full-length mock test will surely help you in fetching more marks in the JEE Main Exam 2020.

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