Class 12 Physics Chapter 5 Magnetism and Matter formula sheet covers every key formula from magnetic dipole moment to Curie's law, with SI units and physical meaning for each. Chapter 5 carries 3 marks in CBSE boards and contributes 1-2 questions in JEE Main and NEET. Download the single-page PDF below for night-before revision.
- 9 core formulas verified against 2026-27 NCERT, the CBSE marking scheme, and JEE Main PYQs.
- CBSE weightage: 3 marks - bar magnet field, Curie's law, and torque on dipole come up most often.
- JEE Main and NEET: 2-3 derived results beyond CBSE syllabus are flagged in the PDF.
Class 12 Physics Chapter 5 Formula Sheet: Complete Reference
The 9 formulas below cover every numerical the chapter generates. Each row gives the concept, the formula, and the SI unit. Students preparing for JEE Main and NEET will find 2-3 extra derived results flagged in the PDF.
| 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 |
Diamagnetic / Paramagnetic / Ferromagnetic - quick reference.
Magnetism and Matter Class 12 Physics - Video Lecture
Source: JEE Wallah on YouTube
Magnetic dipole moment: definition and torque formula.
Topic-by-Topic Breakdown for Magnetism and Matter Class 12 Physics
The chapter divides into 5 sub-topic blocks. Each block has its own characteristic formulas and typical marks in the board paper.
- Bar magnet and magnetic field lines: 1 mark on properties - frequently asked as MCQ.
- Magnetic dipole moment and torque: 2 marks on m = I A and tau = m cross B.
- Earth's magnetism: 3 marks on declination, dip, and horizontal component.
- Magnetisation and magnetic intensity: 3 marks on M = chi H and B = mu_0 (H + M).
- Diamagnetic, paramagnetic, ferromagnetic: 2 marks on hysteresis loop differences.
Magnetism and Matter Weightage in Class 12 Physics
The table below shows how Chapter 5 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 |
Previous Year Questions from Magnetism and Matter (2021-2026)
The table below shows every CBSE Board, JEE Main, and NEET appearance of 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 Magnetism and Matter Class 12 Formulas
Mistake 1: Substituting values before simplifying the formula symbolically. Always rearrange to isolate the unknown first.
Mistake 2: Forgetting unit conversion. Use SI units throughout unless the question says otherwise.
Mistake 3: Using approximate constants (k = 9 x 109 vs the exact 8.99 x 109). For 5-mark numericals, use the value given in the question or the exact constant.
Mistake 4: Confusing the axial and equatorial dipole field formulas. The formula sheet table keeps them in separate rows for easy comparison.
Each one costs 1 to 2 marks.
Student Feedback
In a Collegedunia poll of 10,760 Class 12 Physics students before the 2026 boards, 74% of students rated the formula sheet as their most-used revision resource, ahead of full chapter notes and solved-example PDFs.
- 74% of students surveyed placed the formula sheet at the top of their revision priority list.
- 58% said they reviewed it daily in the last 7 days before the boards.
- 4 out of 5 students keep a printed copy in their notebook.
- Average revision time: 12 minutes per chapter for a focused pass.
- 67% used the formula sheet alongside their Chapter Notes during the night-before revision.
Source: 2025-26 Class 12 Physics student poll. Sample of 10,760 students from CBSE schools across 16 states.
Other Resources for Class 12 Physics Chapter 5 - Magnetism and Matter
| Resource | Link |
|---|---|
| Notes | Magnetism and Matter Notes |
| NCERT Solutions | Magnetism and Matter NCERT Solutions |
| NCERT Book PDF | Magnetism and Matter NCERT Book PDF |
| Exemplar Book PDF | Magnetism and Matter Exemplar Book PDF |
| Exemplar Solutions | Magnetism and Matter Exemplar Solutions |
| Handwritten Notes | Magnetism and Matter Handwritten Notes |
| Formula Sheet | Magnetism and Matter Formula Sheet |
NCERT Formula Sheets for Class 12 Physics: All Chapters
| Chapter | Resource |
|---|---|
| Chapter 1 | Electric Charges and Fields Formula Sheet |
| Chapter 2 | Electrostatic Potential and Capacitance Formula Sheet |
| Chapter 3 | Current Electricity Formula Sheet |
| Chapter 4 | Moving Charges and Magnetism Formula Sheet |
| Chapter 5 | Magnetism and Matter Formula Sheet |
| Chapter 6 | Electromagnetic Induction Formula Sheet |
| Chapter 7 | Alternating Current Formula Sheet |
| Chapter 8 | Electromagnetic Waves Formula Sheet |
| Chapter 9 | Ray Optics and Optical Instruments Formula Sheet |
| Chapter 10 | Wave Optics Formula Sheet |
| Chapter 11 | Dual Nature of Radiation and Matter Formula Sheet |
| Chapter 12 | Atoms Formula Sheet |
| Chapter 13 | Nuclei Formula Sheet |
| Chapter 14 | Semiconductor Electronics Formula Sheet |
Class 12 Physics Chapter 5 Magnetism and Matter Formula Sheet FAQs
Ques. How many formulas are in the Class 12 Chapter 5 Physics formula sheet?
Ans. 9 formulas cover every numerical the chapter generates. The Quick-Reference Table above lists them with units. The PDF carries the same list on a single A4 sheet for night-before revision.
Ques. What is the weightage of Class 12 Physics Chapter 5?
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. The formula sheet covers the formulas needed for every variant.
Ques. Where can I download the Chapter 5 Physics Class 12 formula sheet PDF?
Ans. The PDF is available directly on this page via the flipbook above. Both the inline viewer and the download link give you all 9 formulas plus the JEE/NEET extensions on one page.
Ques. Are the JEE Main extensions covered in this formula sheet?
Ans. Yes. The formula sheet includes 2-3 extensions that JEE Main and JEE Advanced test but CBSE boards rarely ask. These are flagged with a distinct marker in the PDF.
Ques. What is the most-asked formula from this chapter?
Ans. Magnetic dipole moment is the foundational formula and appears in most Chapter 5 numericals. The full list of high-frequency formulas is in the Quick-Reference Table above.
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