The Central Board of Secondary Education (CBSE) will hold the Class 12 Physics examination 2026 on February 20, 2026 . This exam is part of the larger CBSE Class 12 examinations, which will take place from February 17, 2026, to April 9, 2026 . The Physics exam carries a total of 100 marks . Out of these, 70 marks are for the theory paper, and 30 marks are for the practical assessment. The theory paper will last for 3 hours and will have 33 questions spread across five sections. Students preparing for the CBSE Class 12 Physics exam in 2026 should focus on key topics for better preparation. This article lists these important topics from each chapter.
CBSE Class 12 Physics 2026: Key Topics for Exam
Below is a table showing the chapters, their approximate weightage, and the main topics students must study for the 2026 Physics board exam.
| Units | Chapter Name | Approx. Weightage | Important Topics for Exam Day |
| Unit 1: Electrostatics | Chapter 1: Electric Charges and Fields | 5 marks | Coulomb's Law, Dipole, Application of Gauss's Law |
| Chapter 2: Electrostatic Potential and Capacitance | 5 marks | Equipotential Surface, Potential Energy of the System of Charges, Energy stored in the capacitor | |
| Unit 2: Current Electricity | Chapter 3: Current Electricity | 6 marks | Drift of Electrons and Resistivity, Temperature Dependence of Resistivity, Kirchhoff’s Law, Wheatstone bridge |
| Unit 3: Magnetic Effects of Current and Magnetism | Chapter 4: Moving Charges and Magnetism | 6 marks | Motion in a magnetic Field, Force Between Two Parallel Wires, Moving coil galvanometer |
| Chapter 5: Magnetism and Matter | 5 marks | The Bar Magnet, Magnetic Properties of Material | |
| Unit 4: Electromagnetic Induction and Alternating Currents | Chapter 6: Electromagnetic Induction | 4 marks | Lenz’s Law, Faraday Law, Self and mutual Induction |
| Chapter 7: Alternating Current | 2 marks | Series LCR, Power in AC circuits, Transformers | |
| Unit 5: Electromagnetic Waves | Chapter 8: Electromagnetic Waves | 4 marks | Displacement Current, Electromagnetic Spectrum |
| Unit 6: Optics | Chapter 9: Ray Optics and Optical Instruments | 10 marks | Optical Instruments (Diagrams) |
| Chapter 10: Wave Optics | 4 marks | Reflection and Refraction of Wave Theory, Interference and YDSE | |
| Unit 7: Dual Nature of Radiation and Matter | Chapter 11: Dual Nature of Radiation and Matter | 4 marks | Einstein Photoelectric Equation, All Graphs, Wave Nature of Matter |
| Unit 8: Atoms and Nuclei | Chapter 12: Atoms | 4 marks | Alpha Particle Experiment and Model, Bohr Model |
| Chapter 13: Nuclei | 4 marks | Mass Energy and BEN Curve, Nuclear Force, Nuclear Energy | |
| Unit 9: Electronic Devices | Chapter 14: Semiconductor Electronics | 7 marks | P-N Junction, Semiconductor Diode, Application of Diode |
Detailed Topics for Revision
Students should pay close attention to the following specific topics within each unit for their exam preparation.
Unit 1: Electrostatics
- Chapter 1: Electric Charges and Fields: Coulomb's Law, Dipole, Applications of Gauss's Law.
- Chapter 2: Electrostatic Potential and Capacitance: Equipotential Surface, Potential Energy of the System of Charges, Energy stored in the capacitor.
Unit 2: Current Electricity
- Chapter 3: Current Electricity: Drift of Electrons and Resistivity, Temperature Dependence of Resistivity, Kirchhoff’s Law, Wheatstone bridge.
Unit 3: Magnetic Effects of Current and Magnetism
- Chapter 4: Moving Charges and Magnetism: Motion in a magnetic Field, Force Between Two Parallel Wires, Moving coil galvanometer.
- Chapter 5: Magnetism and Matter: The Bar Magnet, Magnetic Properties of Material.
Unit 4: Electromagnetic Induction and Alternating Currents
- Chapter 6: Electromagnetic Induction: Lenz’s Law, Faraday Law, Self and mutual Induction.
- Chapter 7: Alternating Current: Series LCR circuits, Power in AC circuits, Transformers.
Unit 5: Electromagnetic Waves
- Chapter 8: Electromagnetic Waves: Displacement Current, Electromagnetic Spectrum.
Unit 6: Optics
- Chapter 9: Ray Optics and Optical Instruments: Optical Instruments (Diagrams).
- Chapter 10: Wave Optics: Reflection and Refraction of Wave Theory, Interference and YDSE.
Unit 7: Dual Nature of Radiation and Matter
- Chapter 11: Dual Nature of Radiation and Matter: Einstein Photoelectric Equation, All Graphs, Wave Nature of Matter.
Unit 8: Atoms and Nuclei
- Chapter 12: Atoms: Alpha Particle Experiment and Model, Bohr Model.
- Chapter 13: Nuclei: Mass Energy and BEN Curve, Nuclear Force, Nuclear Energy.
Unit 9: Electronic Devices
- Chapter 14: Semiconductor Electronics: P-N Junction, Semiconductor Diode, Applications of the Diode.
Important Advice for Students
This list of topics is a guide for your preparation. Make sure to cover these areas thoroughly. Practicing past year questions related to these topics can also help. For any official announcements or further details about the CBSE Class 12 examinations 2026, students should always check the official CBSE website.
