# Physics Syllabus for JEE Mains & Advanced – 2021

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Contents

## Physics Syllabus for JEE Main

### Physics Syllabus for JEE Main Section A

 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, 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. 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 8: Thermodynamics Thermal equilibrium, 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 9: Kinetic Theory of Gases Equation of state of a perfect gas, work done on compressing a gas. Kinetic theory of gases-assumptions, the 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. Unit 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, the reflection of waves, Standing waves in strings and organ pipes, fundamental mode and harmonics, Beats, Doppler effect in sound Unit 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, a combination of capacitors in series and in parallel, the capacitance of a parallel plate capacitor with and without dielectric medium between the plates, Energy stored in a capacitor. Unit 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, a combination of cells in series and in parallel. Kirchhoffs laws and their applications. Wheatstone bridge, Metre bridge. Potentiometer – principle and its applications. Unit 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. The force between two parallel current-carrying conductors-definition of ampere, Torque experienced by a current loop in a 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 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, wattles current. AC generator and transformer. Unit 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. Unit 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. Unit 17: Dual Nature of Matter and Radiation Dual nature of 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. Davis son-Germer experiment. Unit 18: 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; radioactive decay law. Mass-energy relation, mass defect; binding energy per nucleon and its variation with mass number, nuclear fission and fusion. Unit 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. Unit 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).

Sometimes questions from experimental skills can also be asked in the JEE, so here on Byjus, we have provided the syllabus for the same.

## JEE Mains Physics Syllabus Section B (20% weightage)

Experimental Skills

• Vernier callipers: its use to measure the 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: the mass of a given object by the principle of moments.
• Young’s modulus of elasticity of the material of a metallic wire.
• The surface tension of water by capillary rise and effect of detergents.
• The coefficient of Viscosity of a given viscous liquid by measuring the terminal velocity of a given spherical body.
• Plotting a cooling curve for the relationship between the temperature of a hot body and time.
• The speed of sound in air at room temperature using a resonance tube.
• The specific heat capacity of a given: Solid, and liquid by method of mixtures.
• The resistivity of the material of a given wire using meter bridge.
• The resistance of a given wire using Ohm’s law.
• Potentiometer: Comparison of emf of two primary cells and Determination of the internal resistance of a cell.
• Resistance and figure of merit of a galvanometer by half deflection method.
• The focal length of a Convex mirror, Concave mirror, and Convex lens using the parallax method.
• The plot of the angle of deviation vs angle of incidence for a triangular prism.
• Refractive index of a glass slab using a travelling 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 the 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).

 Unit 1: General Physics Units and Dimensions Units and dimensions, dimensional analysis. Least count and significant figures. Experimental Analysis Methods of measurement and error analysis for physical quantities pertaining to the following experiments: Experiments based on using Vernier callipers and screw gauge (micrometre). Determination of g using the simple pendulum. Young’s modulus by Searle’s method. Specific heat of a liquid using calorimeter, the focal length of a concave mirror and a convex lens using the u-v method. The speed of sound using resonance column. Verification of Ohm’s law using voltmeter and ammeter, and specific resistance of the material of a wire using meter bridge and post office box. Unit 2 Mechanics Kinematics Kinematics in one and two dimensions (Cartesian coordinates only), projectiles. Uniform Circular motion, relative velocity. Newton’s laws of motion Newton’s laws of motion, Inertial and uniformly accelerated frames of reference. Static and dynamic friction, Kinetic and potential energy. Work and power. Conservation of linear momentum and mechanical energy. Systems of particles Centre of mass and its motion; Impulse. Elastic and inelastic collisions. Gravitation Laws of gravitation. Gravitational potential and field, acceleration due to gravity. The motion of planets and satellites in circular orbits and escape velocity. Inertia and Momentum Rigid body, the moment of inertia, parallel and perpendicular axes theorems, the moment of inertia of uniform bodies with simple geometrical shapes. Angular momentum, Torque, Conservation of angular momentum. Dynamics of rigid bodies with a fixed axis of rotation. Rolling without slipping of rings, cylinders, and spheres; Equilibrium of rigid bodies. The collision of point masses with rigid bodies. Harmonic motions Linear and angular simple harmonic motions. Hooke’s law, Young’s modulus. The pressure in a fluid Pascal’s law; Buoyancy. Surface energy and surface tension, capillary rise, viscosity (Poiseuille’s equation excluded). Stoke’s law, terminal velocity, Streamline flow, the equation of continuity, Bernoulli’s theorem and its applications. Waves Wave motion (plane waves only), longitudinal and transverse waves, superposition of waves. Progressive and stationary waves. The vibration of strings and air columns, Resonance, Beats. The speed of sound in gases; Doppler effect (in sound). Thermal Physics Thermal expansion of solids, liquids, and gases, calorimetry, latent heat . Heat conduction in one dimension, elementary concepts of convection and radiation, Newton’s law of cooling; Ideal gas laws. Specific heats (Cv and Cp for monatomic and diatomic gases), Isothermal and adiabatic processes, the bulk modulus of gases. Equivalence of heat and work, First law of thermodynamics and its applications (only for ideal gases). Blackbody radiation, absorptive and emissive powers, Kirchhoff’s law. Wien’s displacement law, Stefan’s law. Unit 3 Electricity and magnetism Electric Fields Coulomb’s law; Electric field and potential. The electrical potential energy of a system of point charges and of electrical dipoles in a uniform electrostatic field. Electric field lines; Flux of the electric field. Gauss’s law and its application in simple cases, such as, to find field due to the infinitely long straight wire, uniformly charged infinite plane sheet and uniformly charged thin spherical shell. Capacitance Capacitance, Parallel plate capacitor with and without dielectrics. Capacitors in series and parallel, Energy stored in a capacitor. Electric current Electric current; Ohm’s law; Series and parallel arrangements of resistances and cells. Kirchhoff’s laws and simple applications. Heating effect of current. Magnetic Fields Biot Savart’s law and Ampere’s law. Magnetic field near a current-carrying straight wire, along with the axis of a circular coil and inside a long straight solenoid. Force on a moving charge and on a current-carrying wire in a uniform magnetic field. The magnetic moment of a current loop; Effect of a uniform magnetic field on a current loop. Moving coil galvanometer, voltmeter, ammeter and their conversions. Electromagnetic Induction Electromagnetic induction, Faraday’s law, Lenz’s law. Self and mutual inductance. RC, LR and LC circuits with D.C. and A.C. sources. Unit 4 Optics Reflection and Refraction Rectilinear propagation of light. Reflection and refraction at plane and spherical surfaces, total internal reflection. Deviation and dispersion of light by a prism. Thin lenses, Combinations of mirrors and thin lenses; Magnification. Wave nature of light Huygen’s principle. Interference limited to Young’s double-slit experiment. Unit 5 Modern Physics Atoms and Nuclei Atomic nucleus; Alpha, beta and gamma radiations; Law of radioactive decay. Decay constant; Half-life and mean life; Binding energy and its calculation; Fission and fusion processes; Energy calculation in these processes. Photoelectric effect; Bohr’s theory of hydrogen-like atoms; Characteristic and continuous X-rays. Moseley’s law; de Broglie wavelength of matter waves.

Thank You.