Class 12 revised syllabus of Physics for year 2020-2021

Dear students,

As per the CBSE, there is some changes in syllabus of class 12.

CBSE has reduced the syllabus by almost 30% and new syllabus is introduced for the year 2020-2021 students.

Here is updated syllabus for subjects Chemistry :-

Chapter–1: Electric Charges and Fields

Electric Charges; Conservation of charge, Coulomb's law-force 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 uniform electric fleld.

Electric  flux, statement of Gauss's theorem and its  applications to find field due to infinitely long straight wire.

Chapter–2: Electrostatic Potential and Capacitance

Electric potential, potential difference, electric potential due to a point charge, a dipole and system of  charges; equipotential surfaces, electrical potential energy of a system of two point charges and of  electric dipole in an electrostatic field.

Conductors  and insulators,   free charges and bound    charges inside a conductor. Dielectrics and electric polarisation, capacitors and capacitance, 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.

Chapter–3: Current Electricity

Electric current, flow of electric charges in a metallic conductor, drift velocity, mobility   and their relation with electric current; Ohm's law, electrical resistance, V-I characteristics  (linear and non-linear), electrical energy and power, electrical resistivity and conductivity.

Internal resistance of a cell, potential difference and emf of a cell, combination of  cells in series and in parallel, Kirchhoff's laws and simple applications, Wheatstone bridge, metre bridge.

Potentiometer  - principle and its  applications to measure potential  difference and for comparing EMF of two cells; measurement of internal resistance of a cell.

Chapter–4: Moving Charges and Magnetism

Concept of magnetic field, Oersted's experiment.

Biot - Savart law and its application to current carrying circular loop.

Ampere's law and its applications to infinitely long straight wire. Straight and toroidal solenoids (only qualitative treatment), force on  a moving charge in uniform magnetic and electric fields.

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.

Chapter–5: Magnetism and Matter

Current loop as a magnetic dipole and its magnetic dipole moment, magnetic dipole  moment of a revolving electron, bar magnet as an equivalent solenoid, magnetic field lines; earth's magnetic field and magnetic elements.

Chapter–6: Electromagnetic Induction

Electromagnetic induction; Faraday's laws, induced EMF and current; Lenz's

Law, Eddy currents. Self and mutual induction.

Chapter–7: Alternating Current

Alternating currents, peak and RMS value of alternating current/voltage; reactance and impedance; LC oscillations (qualitative treatment only), LCR series circuit, resonance; power in AC circuits.

AC generator and transformer.

Chapter–8: Electromagnetic Waves

Electromagnetic waves, their characteristics, their Transverse nature (qualitative ideas only).

Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays) including elementary facts about their uses.

Chapter–9: Ray Optics and Optical Instruments

Ray Optics: refraction of light, total internal reflection and its applications, optical fibres, refraction at spherical  surfaces, lenses, thin lens formula, lensmaker's formula, magnification, power of a lens, combination of thin lenses in contact, refraction of light through a prism.

Optical instruments: Microscopes and astronomical telescopes (reflecting and refracting) and their magnifying powers.

Chapter–10: Wave Optics

Wave optics: Wavefront and Huygen’s principle, reflection and refraction of plane  wave at a plane surface using wave fronts. Proof of 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.

Chapter–11: Dual Nature of Radiation and Matter

Dual nature of radiation, Photoelectric effect, Hertz and Lenard's observations; Einstein's photoelectric equation-particle nature of light.

Experimental study of photoelectric effect

Matter waves-wave nature of particles, de-Broglie relation.

Chapter–12: Atoms

Alpha-particle scattering experiment; Rutherford's model of atom; Bohr model, energy levels, hydrogen spectrum.

Chapter–13: Nuclei

Composition and size of nucleus.

Mass-energy  relation, mass  defect; nuclear fission, nuclear fusion.

Chapter–14: Semiconductor Electronics: Materials,  Devices and Simple Circuits

Energy bands in conductors, semiconductors  and insulators (qualitative ideas only)

Semiconductor diode - I-V characteristics in forward and reverse bias, diode as a rectifier;

Special  purpose p-n  junction diodes:  LED, photodiode, solar  cell.