CBSE Class 12 Physics chapter-wise weightage 2027
How the board shares out the 70 theory marks of the 2027 Class 12 Physics exam, unit by unit, with the chapters in each unit. From CBSE's 2026-27 curriculum, checked on 2026-11-10. JEE Main and NEET are set from the same NCERT chapters, so for them every chapter counts; these weights are where the board puts its marks.
| Unit | Chapters | Marks | Share |
|---|---|---|---|
| Electrostatics and Current Electricity Units I and II | 1. Electric Charges and Fields 2. Electrostatic Potential and Capacitance 3. Current Electricity | 16 | 23% |
| Magnetic Effects of Current, Magnetism, EMI and AC Units III and IV | 4. Moving Charges and Magnetism 5. Magnetism and Matter 6. Electromagnetic Induction 7. Alternating Current | 17 | 24% |
| Electromagnetic Waves and Optics Units V and VI | 8. Electromagnetic Waves 9. Ray Optics and Optical Instruments 10. Wave Optics | 18 | 26% |
| Dual Nature, Atoms and Nuclei Units VII and VIII | 11. Dual Nature of Radiation and Matter 12. Atoms 13. Nuclei | 12 | 17% |
| Electronic Devices Unit IX | 14. Semiconductor Electronics: Materials, Devices and Simple Circuits | 7 | 10% |
| Total | 70 | 100% |
Plus 30 marks for practical. Where a unit has more than one chapter, the board gives marks to the unit, not to each chapter.
Where the marks are
The paper: 33 questions, 70 marks, 3 hours
| Section | Questions | How many | Marks each | Total |
|---|---|---|---|---|
| Section A | 12 multiple-choice and 4 assertion-reason | 16 | 1 | 16 |
| Section B | Short answer | 5 | 2 | 10 |
| Section C | Short answer | 7 | 3 | 21 |
| Section D | Case study | 2 | 4 | 8 |
| Section E | Long answer | 3 | 5 | 15 |
From CBSE's 2026-27 sample question paper (PDF). Internal choice is given in some questions.
How to use this
- Start with Electromagnetic Waves and Optics and Magnetic Effects of Current, Magnetism, EMI and AC: together they are 35 of the 70 marks.
- Do not skip a small unit: Electronic Devices is 7 marks, often in short questions you can be sure of.
- Find your weakest chapter first: a free 25-minute test names it, then practise it on its page.
Practise the whole paper: free Class 12 Physics sample papers, set to these weights.
Questions students ask
Electrostatics and Current Electricity: 16 marks; Magnetic Effects of Current, Magnetism, EMI and AC: 17 marks; Electromagnetic Waves and Optics: 18 marks; Dual Nature, Atoms and Nuclei: 12 marks; Electronic Devices: 7 marks. Total 70 marks in the theory paper, plus 30 for practical.
Electromagnetic Waves and Optics, with 18 of 70 marks, then Magnetic Effects of Current, Magnetism, EMI and AC with 17.
No. The unit marks in CBSE's 2026-27 curriculum are the same as in 2025-26.
33 questions for 70 marks in 3 hours: Section A, 16 × 1 mark (12 multiple-choice and 4 assertion-reason); Section B, 5 × 2 marks (short answer); Section C, 7 × 3 marks (short answer); Section D, 2 × 4 marks (case study); Section E, 3 × 5 marks (long answer).
Source: CBSE curriculum 2026-27, Physics. Unit marks from CBSE's 2026-27 curriculum; question pattern from CBSE's 2026-27 sample question papers. Read on cbseacademic.nic.in on 2026-11-10. Unit marks are unchanged from 2025-26.