Class 12 Physics Chapter 5 Magnetism and Matter covers bar magnet and magnetic field lines through diamagnetic, paramagnetic, ferromagnetic. The chapter carries 3 marks in CBSE and 1 to 2 percent in JEE Main. This page hosts the class 12 physics NCERT notes chapter 5 magnetism and matter PDF.
- CBSE Boards: 3 marks, usually one derivation block plus one short-answer concept question.
- JEE Main: 1 to 2 percent, with steady annual coverage on derivations and numericals.
- NEET: 1 question every year on chapter concepts.
Topic-by-Topic Concept Summary for Class 12 Physics Chapter 5 Handwritten Notes
The chapter splits into 5 sub-topic blocks. The walkthrough below maps each block to its CBSE marking pattern.
- Bar magnet and magnetic field lines: 1-mark on properties
- Magnetic dipole moment and torque: 2-mark on m = I A, tau = m cross B
- Earth's magnetism: 3-mark on declination, dip, horizontal component
- Magnetisation and magnetic intensity: 3-mark on M = chi H, B = mu_0 (H + M)
- Diamagnetic, paramagnetic, ferromagnetic: 2-mark on hysteresis loop
Magnetism and Matter Class 12 - Video Lecture
Source: NCERT Wallah on YouTube
Class 12 Physics Chapter 5 All Formulas: Quick-Reference Table
The physics chapter 5 class 12 all formulas list below covers every numerical the chapter generates. The same table sits on the back of the physics class 12 chapter 5 pdf for last-minute revision.
| Concept | Formula | SI Unit |
|---|---|---|
| Magnetic dipole moment | m = I A | A m² |
| Torque on dipole | tau = m cross B | N m |
| Potential energy | U = minus m . B | joule |
| Magnetic field of bar magnet (axial) | B_axial = mu_0 (2m) / (4 pi r³) | tesla |
| Magnetic field of bar magnet (equatorial) | B_eq = mu_0 m / (4 pi r³) | tesla |
| Earth's horizontal component | B_H = B_total cos(dip) | tesla |
| Magnetic susceptibility | chi = M / H | dimensionless |
| Relative permeability | mu_r = 1 + chi | dimensionless |
| Curie's law | chi = C / T | 1/K |
Full formula sheet with derivations: Class 12 Physics Chapter 5 Formula Sheet
Class 12 Physics Chapter 5 All Derivations: Index Table
These 4 derivations carry the bulk of the CBSE marks for Chapter 5. Each one in the PDF includes the geometry sketch and full working.
| Derivation | Marks (CBSE) |
|---|---|
| Bar magnet axial field | 3 |
| Bar magnet equatorial field | 3 |
| Torque on dipole in uniform field | 2 |
| Curie's law for paramagnets | 2 |
Magnetism and Matter Weightage Compared Across Class 12 Physics Chapters
The table below maps how Class 12 Physics Chapter 5 weightage compares with every other chapter. Marks are CBSE board averages over the last five papers.
| Chapter | Topic | Avg CBSE Marks |
|---|---|---|
| Ch 1 | Electric Charges and Fields | 6 marks |
| Ch 2 | Electrostatic Potential and Capacitance | 7 marks |
| Ch 3 | Current Electricity | 7 marks |
| Ch 4 | Moving Charges and Magnetism | 6 marks |
| Ch 5 | Magnetism and Matter | 3 marks |
| Ch 6 | Electromagnetic Induction | 5 marks |
| Ch 7 | Alternating Current | 6 marks |
| Ch 8 | Electromagnetic Waves | 2 marks |
| Ch 9 | Ray Optics and Optical Instruments | 7 marks |
| Ch 10 | Wave Optics | 5 marks |
| Ch 11 | Dual Nature of Radiation and Matter | 4 marks |
| Ch 12 | Atoms | 3 marks |
| Ch 13 | Nuclei | 3 marks |
| Ch 14 | Semiconductor Electronics | 6 marks |
Magnetism and Matter Previous Year Questions Weightage (2021 to 2026)
The table below maps every CBSE Board, JEE Main, and NEET appearance of Class 12 Physics Chapter 5 topics over the last six sessions.
| Year | CBSE Board | JEE Main | NEET |
|---|---|---|---|
| 2026 | Bar magnet axial field (3 marks) | Earth's horizontal component (4 marks) | Magnetic materials: dia, para and ferromagnetism |
| 2025 | Curie's law derivation (3 marks) | Magnetic susceptibility comparison | Diamagnetic property MCQ |
| 2024 | Magnetic intensity vs magnetisation (3 marks) | Hysteresis loop interpretation | Ferromagnetic material |
| 2023 | Torque on a dipole (2 marks) | Magnetic dipole moment calculation | Earth's magnetism elements |
| 2022 | Bar magnet equatorial field (3 marks) | Pole strength definition | Magnetic flux density |
| 2021 | - | Magnetic flux through a coil | Magnetic field lines property |
Common Mistakes in Class 12 Chapter 5 Physics
Mistake 1: Skipping the unit balance step. CBSE markers award marks for showing dimensional consistency on derivations.
Mistake 2: Confusing scalar and vector quantities in formulas. Add scalars algebraically, vectors as components.
Mistake 3: Forgetting boundary conditions in the earth's magnetism derivation. State assumptions explicitly before doing the algebra.
Mistake 4: Using approximate values when the question demands exact symbolic answers. Boards mark down for premature numerical substitution.
Each one costs 1 to 2 marks.
Student Feedback: Magnetism and Matter Class 12 Handwritten Notes
In a Collegedunia poll of 10,760 Class 12 Physics students before the 2026 boards, 69% rated the magnetic intensity vs magnetisation distinction as the trickiest sub-topic, ahead of Curie's law derivation.
Student Feedback
What 10,760 students told us about the Chapter 5 Magnetism and Matter notes:
- 69% of students surveyed marked the magnetic intensity vs magnetisation distinction as the most-confusing sub-topic.
- 57% reported confusion in the Curie's law derivation block on at least one class test.
- 4 out of 5 students said the Bar magnet axial field was the most-practised derivation the night before boards.
- Average student took 5.0 hours for first-read and 2.4 hours for focused revision.
- Out of 10,760 students, 61% read these ch 5 physics class 12 notes at least twice before their boards.
Source: 2025-26 Class 12 Physics student poll. Sample of 10,760 students from CBSE schools across 16 states.
How to Revise Class 12 Chapter 5 Physics in 2 Hours
- 0 to 30 min: Bar magnet and magnetic field lines + Magnetic dipole moment and torque. Solve 2 numericals.
- 30 to 60 min: Earth's magnetism derivation walkthrough.
- 60 to 90 min: Magnetisation and magnetic intensity block.
- 90 to 120 min: Flush through the 9-formula reference and the 4-derivation index.
Budget 5 to 6 hours for first-read; ch 5 physics class 12 notes are best read after the prerequisite chapter.
Other Resources for Class 12 Physics Chapter 5 Magnetism and Matter
| Resource Type | Link |
|---|---|
| NCERT Solutions | Class 12 Magnetism and Matter NCERT Solutions |
| Formula Sheet | Class 12 Physics Chapter 5 Formula Sheet |
| NCERT Book PDF | Class 12 Magnetism and Matter NCERT Book PDF |
| Exemplar Book PDF | Class 12 Magnetism and Matter NCERT Exemplar Book PDF |
| Exemplar Solutions | Class 12 Magnetism and Matter NCERT Exemplar Solutions |
| Handwritten Notes | Magnetism and Matter Handwritten Notes |
NCERT Handwritten Notes for Class 12 Physics: All Chapters
| Chapter | Resource |
|---|---|
| Chapter 1 | Electric Charges and Fields Handwritten Notes |
| Chapter 2 | Electrostatic Potential and Capacitance Handwritten Notes |
| Chapter 3 | Current Electricity Handwritten Notes |
| Chapter 4 | Moving Charges and Magnetism Handwritten Notes |
| Chapter 5 | Magnetism and Matter |
| Chapter 6 | Electromagnetic Induction Handwritten Notes |
| Chapter 7 | Alternating Current Handwritten Notes |
| Chapter 8 | Electromagnetic Waves Handwritten Notes |
| Chapter 9 | Ray Optics and Optical Instruments Handwritten Notes |
| Chapter 10 | Wave Optics Handwritten Notes |
| Chapter 11 | Dual Nature of Radiation and Matter Handwritten Notes |
| Chapter 12 | Atoms Handwritten Notes |
| Chapter 13 | Nuclei Handwritten Notes |
| Chapter 14 | Semiconductor Electronics Handwritten Notes |
Class 12 Physics Chapter 5 Magnetism and Matter Handwritten Notes FAQs
Ques. What are the main topics in ch 5 physics class 12 notes?
Ans. The class 12 ch 5 physics notes cover bar magnet and magnetic field lines, magnetic dipole moment and torque, earth's magnetism, magnetisation and magnetic intensity, and diamagnetic, paramagnetic, ferromagnetic.
Ques. What are the most-asked derivations in this chapter?
Ans. 4 derivations carry the chapter's mark weight: Bar magnet axial field, Bar magnet equatorial field, Torque on dipole in uniform field, and others listed in the Derivations Index above.
Ques. How many formulas are in the ch 5 physics class 12 notes?
Ans. 9 formulas cover every numerical the chapter generates. The Quick-Reference Table above lists them with units. The physics class 12 chapter 5 pdf carries the same list on a single A4 cover sheet.
Ques. What is the weightage of ch 5 physics class 12?
Ans. Chapter 5 carries 3 marks in CBSE Class 12 Physics, 1 to 2 percent in JEE Main, and 1 question per year in NEET.
Ques. Where can I download the physics chapter 5 class 12 notes pdf?
Ans. The physics class 12 chapter 5 notes pdf is available directly on this page via the download card above. Both Normal and HD versions cover all 9 formulas, 4 derivations, and worked numericals.
Ques. Bar magnet and magnetic field lines: what does it cover?
Ans. 1-mark on properties. The ch 5 physics class 12 notes give the formal definition plus typical numericals.
Ques. What is the hardest sub-topic in ch 5 physics class 12?
Ans. In our 2025-26 student poll, the magnetic intensity vs magnetisation distinction was rated as the trickiest. Detailed coverage is in the section above plus 3 solved examples in the PDF.
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