Class 12 Physics Important Topics

Class 12 Physics Important Topics For CBSE Boards Exam

12 Physics CBSE

Class 12 Physics Important Topics For CBSE Boards Exam

In this article i will be sharing all the important topics for CBSE boards exams through which one can definitely score good marks. I will sharing the topics chapter wise so that you can have better view for the syllabus and it becomes easy work for you all as well.

Here is the list of topics :

Unit 1: Electrostatics

Chapter: 1 is Electric Charges and Fields
Chapter: 2 is Electrostatic Potential and Capacitance.
Important topics and derivations of these chapters are given below:

Chapter 1: Electric Charges and Fields

*Coulomb’s law in vector form (Agreement with Newton’s third law i.e. F12 = ‒F21).

*Electric field intensity on Equatorial Line & Axial Line of an Electric Dipole.

*Electric Field Intensity at various points due to a uniformly charged spherical shell (thin & thick both).

*Electric filed intensity due to a thin infinite plane sheet of charge.

*Application of Gauss theorem in calculation of electric field.

Chapter 2: Electrostatic Potential and Capacitance

*Electric Potential due to a point charge.

*Electric Potential on Axial Line & Equatorial Line of an Electric Dipole.

*Capacitance of parallel plate capacitor (with or without dielectric medium).

*Energy stored in a capacitor.

Unit 2: Current Electricity

Chapter ‒ 3: Current Electricity

*Expression for drift velocity.

*Relation between current and drift velocity.

*Series and parallel connection of resistors (Derivations and Numerical Problems).

*Kirchhoff’s laws and simple applications (Definition and Numerical Problems).

*Potentiometer (Numerical are expected this year)

Unit 3: Magnetic Effects of Current and Magnetism

Important topics and derivations of these chapters are given below:

Chapter – 4: Moving Charges and Magnetism

*Application of Biot – Savart law (Calculation of magnetic field due to current carrying circular loop).

*Ampere’s law and its applications (Magnetic field due to infinitely long straight wire; Straight and toroidal solenoids).

*Force on a moving charge in uniform magnetic and electric fields (Numerical and Derication)

*Cyclotron (Diagram, Theory and Derivation).

*Force on a current-carrying conductor in a uniform magnetic field (Derivation and Numerical Problems).

*Force between two parallel current-carrying conductors (including 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.

*Magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and perpendicular to its axis.

*Torque on a magnetic dipole (bar magnet) in a uniform magnetic field.

*Properties of Para-, dia- and ferro – magnetic substances

Unit 4 Electromagnetic Induction and Alternating Current

Important topics and derivations of these chapters are given below:

Chapter – 6: Electromagnetic Induction

*Motional EMF or Induced EMF (Derivations and Numerical Problems).

*Mutual Induction and Self Induction.

Chapter – 7: Alternating Current

*Relation between rms and peak value of current & emf (Numerical Problems and Derivations).

*Reactance, impedance & average power in series LCR, LR, CR or LR circuit. (Numerical Problems and Derivations).

*Resonance in series LCR circuit. (Numerical Problems and Derivations).

Unit 5: Electromagnetic waves

*Displacement current (Basic Concept)

Characteristic and Properties of EM Waves

*Electromagnetic spectrum

Unit 6 Optics

Important topics of this chapter are given below:

Chapter-9: Ray Optics and Optical Instruments

*Total Internal Reflection (Definition and Numerical Problems)

*Lensmaker’s formula (Derivations and Numerical Problems)

*Refraction and dispersion of light through a prism (Derivations and Numerical Problems)

*Scattering of light (Blue colour of sky, reddish appearance of the sun at sunrise and sunset)

*Microscopes and astronomical telescopes (Ray Diagram & Numerical Problems)

*Refractive Index of a Prism and Condition for Minimum Deviation (Derivations and Numerical Problems)

Chapter-10: Wave Optics

*Young double slit experiment (Derivations and Numerical Problems)

*Diffraction using single slit (Derivations and Numerical Problems)

*Polarisation (Definition and Numerical Problems)

Unit 7: Dual Nature of Radiation and Matter

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

Unit 8: Atoms and Nuclei

Chapter-12: Atoms

*Alpha-particle scattering experiment

*Expression of radius (hydrogen like atoms)

*Bohr model, energy levels, hydrogen spectrum (Including numerical problems)

Chapter-13: Nuclei

*N = N0 e‒λt

*Mass defect (Definition and Numerical Problems)

*Binding energy per nucleon and its variation with mass number (Definition and Numerical Problems)

*Nuclear fission & Nuclear fusion (Definition and Numerical Problems)

Unit 9 Electronic Devices

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

*Junction transistor: Common base transistor amplifier and Common emitter transistor amplifier

Unit 10 Communication System

Chapter-15: Communication System

*Elements of a communication system

*Propagation of electromagnetic waves in the atmosphere, sky & space wave propagation, satellite communication.

*Types of Modulation and Modulation Index

Except this you need to solve all intext and excersise questions of NCERT as well as solve NCERT EXEMPLAR of all the chapters. By covering this you can definitely reach the stepping success of the life so best of luck.