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## JEE Main Syllabus for Physics: Important topics, Weightage Analysis

Latest Update: As announced by the HRD Minister Mr Ramesh Pokhriyal on 5th May, 2020, the JEE Main examination will be conducted from 18th – 23rd July, 2020.

JEE Main Syllabus for Physics is provided by the exam conducting authority. This year NTA has made some change in the pattern of the examination. Physics section will hold 25 objective type questions.

JEE Main Syllabus for Physics contains two sections – A and B. Section A pertains to the Theory Part which holds 80% of the total weightage and Section B contains Practical Part (Experimental Skills) having 20% weightage. Read the following article to know more about Physics syllabus for JEE Main 2020.

Also Check | JEE Main Exam Pattern

The following table depicts the JEE Main Syllabus for Physics (Theory Part):

S.No. Unit Topics
1 Physics and Measurement Physics, Technology and society, S.I. units,
Fundamental and derived units.
Least count, accuracy and precision of measuring instruments, Errors in measurement,
Dimensions of Physical quantities, dimensional analysis and its applications
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
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,
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 nonconservative forces;
Elastic and inelastic collisions in one and two dimensions.
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
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. Geostationary satellites.
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
Heat, temperature, thermal expansion;
Specific heat capacity, calorimetry
Change of state, latent heat
Heat transfer-conduction, convection and radiation, Newton’s law of cooling
8 Thermodynamics Thermal equilibrium, zeroth law of thermodynamics, concept of temperature
Heat, work and internal energy
First law of thermodynamics
The second law of thermodynamics: reversible and irreversible processes
Carnot engine and its efficiency
9 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
10 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, speed of a 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 in sound
11 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.
12 Current Electricity Electric current, Drift velocity, Ohm’s law, Electrical resistance, Resistances 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.
13 Magnetic Effects of Current and Magnetism 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 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.
14 Electromagnetic Induction and Alternating Currents Electromagnetic induction
Faraday’s law, induced emf and current
Lenz’s Law, Eddy currents
Self and mutual inductance
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.
15 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.
16 Optics Reflection and refraction of light at plane and spherical surfaces, mirror formula, Total internal reflection and its applications,
Deviation and Dispersion of light by a prism, Lens Formula, Magnification, Power of a Lens, Combination of thin lenses in contact, Microscope and Astronomical Telescope (reflecting and refracting) and their magnifying powers.
Wave optics: wavefront and Huygens’ principle, Laws of reflection and refraction using Huygen’s principle.
Interference, Young’s double slit experiment and expression for fringe width, coherent sources and sustained interference of light.
Diffraction due to a single slit, width of central maximum. Resolving power of microscopes and astronomical telescopes, Polarisation, plane polarized light
Brewster’s law, uses of plane polarized light and Polaroids.
Photoelectric effect, Hertz and Lenard’s observations
Einstein’s photoelectric equation
Particle nature of light
Matter waves-wave nature of the particle, de Broglie relation.
Davis son-Germer experiment.
18 Atoms and Nuclei Alpha-particle scattering experiment
Rutherford’s model of the atom
Bohr model, energy levels, hydrogen spectrum
Composition and size of the nucleus, atomic masses, isotopes, isobars, and 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.
19 Electronic Devices Semiconductors
Semiconductor diode: I-V characteristics in forward and reverse bias
Diode as a rectifier
1-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
20 Communication Systems Propagation of electromagnetic waves in the atmosphere
Sky 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). ## Section B

The following table depicts the JEE Main Syllabus for Physics (Practical Part):

S.No. Experiments
1 Vernier callipers-its use to measure internal and external diameter and depth of a vessel.
2 Screw gauge-its use to determine thickness/ diameter of thin sheet/wire.
3 Simple Pendulum-dissipation of energy by plotting a graph between square of amplitude and time.
4 Metre Scale – mass of a given object by principle of moments.
5 Young’s modulus of elasticity of the material of a metallic wire.
6 Surface tension of water by capillary rise and effect of detergents.
7 Co-efficient of Viscosity of a given viscous liquid by measuring terminal velocity of a given spherical body.
8 Plotting a cooling curve for the relationship between the temperature of a hot body and time.
9 Speed of sound in air at room temperature using a resonance tube.
10 Specific heat capacity of a given (i) solid and (ii) liquid by method of mixtures.
11 Resistivity of the material of a given wire using metre bridge.
12 Resistance of a given wire using Ohm’s law.
13 Potentiometer

-Comparison of emf of two primary cells.

-Determination of internal resistance of a cell.

14 Resistance and figure of merit of a galvanometer by half deflection method
15 Focal length of

-Convex mirror

-Concave mirror, and

-Convex lens

using parallax method

16 Plot of angle of deviation vs angle of incidence for a triangular prism.
17 Refractive index of a glass slab using a traveling microscope.
18 Characteristic curves of a p-n junction diode in forward and reverse bias.
19 Characteristic curves of a Zener diode and finding reverse break down voltage.
20 Characteristic curves of a transistor and finding current gain and voltage gain.
21 Identification of Diode, LED, Transistor, IC, Resistor, Capacitor from mixed collection of such items.
22 Using multimeter to

-Identify base of a transistor

-Distinguish between npn and pnp type transistor

-See the unidirectional flow of current in case of a diode and an LED.

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

Also Check | Important Topics for JEE Main

## Books for preparing JEE Main Physics Syllabus

 Books Author Concepts of Physics Volume 1 and Volume 2 H.C. Verma Feynman Lectures on Physics Feynman, Leighton and Sands Problems in General Physics IE Irodov Objective Questions on Physics- Chapterwise Solved Papers D.C. Pandey Fundamentals of Physics Halliday, Resnick and Walker Problems in Physics AA Pinsky Advance Physics Nelkon and Parker

## Some Numerical Value Type Questions in Physics

Q1. A particle moves in the x-y plane under the influence of a force such that the linear momentum is P(t) = A [ î cos kt – ĵ sin kt ] Where A and k are constants. The angle in degrees between force and momentum is_________.

Ans. 90

Q2. A power line lies along the east – west direction and carries a current of 10 A. The force per meter due to earth’s magnetic field of 10-4 T is 10-X N/m. The value of x is_____________.

Ans. 3

Q3. Light of wavelength 0.6 mm from a sodium lamp falls on a photo cell and causes the emission of photoelectrons for which the stopping potential is 0.5 V. With light of wavelength 0.4 mm from a mercury lamp the stopping potential is 1.5 V. Then, the work function in eV of the photocell surface is____________.

Ans. 1.5 