ISC Class 12 Physics Syllabus 2026-27

The ISC Class 12 Physics syllabus for 2026-2027, prescribed by the Council for the Indian School Certificate Examinations (CISCE), is a comprehensive study of classical and modern physics at the senior secondary level. The syllabus is structured into a Theory Paper and a Practical Examination, together covering topics ranging from Electrostatics and Current Electricity through to Modern Physics, Semiconductors, and Communication Systems.

A thorough command of the ISC Physics syllabus is essential not only for the board examination but also for competitive entrance examinations such as JEE and NEET. This page provides a complete unit-by-unit breakdown of the syllabus, the exam pattern, chapter overview, marking scheme, recommended reference books, and expert preparation tips for the ISC 2027 board examination.

Quick Facts

Exam Pattern

Theory Paper (70 Marks)

The theory paper consists of questions testing conceptual understanding, application of laws and formulas, numerical problem-solving, and short analytical responses. The paper has internal choices in longer-answer questions and a compulsory section of very short answer questions.

Practical Examination (30 Marks)

Detailed Syllabus: Unit-Wise Breakdown

Unit 1: Electrostatics

Electrostatics forms the foundation of the entire Electricity and Magnetism section of the ISC Physics syllabus. Students must develop a strong understanding of electric fields, potentials, and the behaviour of conductors and dielectrics before proceeding to current electricity.

•         Coulomb's Law and principle of superposition

•         Electric field, field lines, and electric flux

•         Gauss's Law and its applications (spherical, cylindrical, planar symmetry)

•         Electric potential energy and electric potential

•         Equipotential surfaces and relation between E and V

•         Capacitors: parallel plate capacitor, capacitance, dielectrics, energy stored

•         Combination of capacitors (series and parallel)

•         Van de Graaff generator (principle and working)

Unit 2: Current Electricity

•         Electric current, drift velocity, and mobility

•         Ohm's Law and its limitations, V-I characteristics

•         Resistance and resistivity; factors affecting resistance

•         Temperature dependence of resistance

•         Combination of resistances (series and parallel)

•         Kirchhoff's Laws and their applications

•         Wheatstone bridge and Metre Bridge

•         Potentiometer: principle, EMF comparison, internal resistance measurement

•         Electric energy and power

Unit 3: Magnetic Effeccs of Current and Magnetism

Magnetic Effects of Current

•         Biot-Savart Law and its applications

•         Ampere's Circuital Law and its applications

•         Force on a current-carrying conductor in a magnetic field

•         Motion of a charged particle in a magnetic field: cyclotron

•         Moving coil galvanometer: construction, principle, conversion to voltmeter and ammeter

Magnetism and Matter

•         Bar magnet as an equivalent solenoid

•         Magnetic field lines, magnetic dipole moment

•         Magnetisation and magnetic intensity

•         Dia, para, and ferromagnetic materials

•         Permanent magnets and electromagnets

Unit 4: Electromagnetic Induction and Alternating Currents

Electromagnetic Induction

•         Faraday's Laws of electromagnetic induction

•         Lenz's Law and conservation of energy

•         Mutual and self-inductance

•         AC generator: principle, construction, working

Alternating Current

•         AC voltage, peak value, rms value

•         AC circuits: resistive, inductive, capacitive

•         LCR series circuit, resonance

•         Power in AC circuits: power factor

•         Transformers: principle, types, efficiency, energy losses

Unit 5: Electromagnetic Waves

•         Displacement current and Maxwell's equations (qualitative)

•         Electromagnetic waves: sources, properties

•         Electromagnetic spectrum: radio, microwave, infrared, visible, ultraviolet, X-rays, gamma rays

•         Applications of electromagnetic waves

Unit 6: Optics

Ray Optics

•         Reflection at curved mirrors: mirror formula, magnification

•         Refraction at plane and spherical surfaces

•         Lens formula and magnification; power of a lens

•         Combination of thin lenses

•         Total internal reflection and its applications (optical fibres)

•         Prism: deviation, dispersion, angular dispersion

•         Optical instruments: microscope, telescope

Wave Optics

•         Wave front and Huygens' principle

•         Young's double slit experiment: interference, fringe width

•         Single slit diffraction: intensity distribution

•         Brewster's Law and polarisation of light

Unit 7: Dual Nature of Radiation and Matter

•         Photoelectric effect: experimental observations

•         Einstein's photoelectric equation

•         Particle nature of light: photon, wave-particle duality

•         de Broglie hypothesis and matter waves

•         Davisson-Germer experiment

Unit 8: Atoms and Nuclei

Atoms

•         Rutherford's nuclear model and Bohr's model of the hydrogen atom

•         Energy levels and spectral series

•         Line spectra of hydrogen

Nuclei

•         Composition of nucleus: atomic number, mass number, isotopes

•         Nuclear size, mass, density

•         Radioactivity: alpha, beta, gamma decay

•         Radioactive decay law and half-life

•         Nuclear binding energy: mass defect

•         Nuclear fission and fusion

Unit 9: Electronic Devices

•         Energy bands in solids: conductors, insulators, semiconductors

•         Intrinsic and extrinsic semiconductors (n-type, p-type)

•         p-n junction diode: I-V characteristics, forward and reverse bias

•         Half-wave and full-wave rectification

•         Zener diode as voltage regulator

•         Transistor: n-p-n and p-n-p, characteristics, transistor as amplifier

•         Logic gates: AND, OR, NOT, NAND, NOR; Boolean algebra

Unit 10: Communication Systems

•         Elements of a communication system: transmitter, channel, receiver

•         Bandwidth of signals and transmission medium

•         Propagation of electromagnetic waves: ground wave, sky wave, space wave

•         Modulation: amplitude modulation (AM) and frequency modulation (FM)

•         Detection of AM signal; need for modulation

•         Internet, mobile telephony, and global positioning system (GPS) (qualitative)

Chapter Overview Table

Marking Scheme

Preparation Tips

Mastering Theory and Derivations

ISC Physics demands that students be equally comfortable with conceptual explanations, mathematical derivations, and numerical problem-solving. A common mistake is to focus exclusively on formulae while neglecting the conceptual reasoning behind them. The board examination rewards students who can explain phenomena clearly and connect theory to application.

•         Derive every important result at least once from first principles, understanding each step

•         Create a derivation booklet with annotated diagrams for all major derivations

•         Practise drawing neat, well-labelled diagrams for circuits, optical systems, and nuclear processes

•         Revise all fundamental constants and unit conversions that appear frequently in numericals

Practical Examination Strategy

•         Familiarise yourself with all prescribed experiments and their procedures well before the practical date

•         Practise recording observations accurately and constructing clean result tables

•         Understand the sources of error in each experiment and how to minimise them

•         Ensure all lab records are complete and verified by the teacher before the practical examination

Frequently Asked Questions

Q1. How many chapters are covered in ISC Physics Class 12?

The ISC Physics syllabus for Class 12 is organised into 10 units covering Electrostatics, Current Electricity, Magnetic Effects, Electromagnetic Induction, Electromagnetic Waves, Optics, Dual Nature, Atoms and Nuclei, Electronic Devices, and Communication Systems. Each unit is examined in the theory paper, and select topics are tested in practicals.

Q2. Which unit carries the highest marks in the ISC Physics theory paper?

Optics is typically the highest-weightage unit in the ISC Physics theory paper, carrying approximately 14 marks. This is followed by Electrostatics, Magnetic Effects, and Electromagnetic Induction, each of which carries approximately 7 to 8 marks. Students should prioritise these high-weightage units while ensuring adequate coverage of all chapters.

Q3. Is the ISC Physics practical difficult?

The ISC Physics practical is manageable with thorough preparation and consistent practice throughout the academic year. Students who maintain complete lab records, practise performing experiments with accuracy, and understand the theoretical basis of each experiment generally perform well. The viva section of the practical rewards students who can explain their procedures and observations clearly.

Q4. Are numericals important in ISC Physics?

Yes. Numericals form a significant part of the ISC Physics theory paper, particularly in long-answer questions. Students must practise solving numericals from all units, paying special attention to correct unit usage, significant figures, and clear presentation of working. Chapters such as Electrostatics, Current Electricity, Optics, and Electromagnetic Induction are especially numerically intensive.

Q5. Can ISC Physics preparation help in JEE and NEET?

Yes. The ISC Physics syllabus overlaps substantially with the JEE Main and NEET syllabi, particularly in Electrostatics, Optics, Modern Physics, and Semiconductors. Students who build strong conceptual and numerical foundations through ISC preparation are well-positioned to perform competitively in entrance examinations. Supplementing ISC preparation with JEE-level problem sets from resources such as H.C. Verma is highly recommended.