Electromagnetic Induction is Chapter 6 of Class 12 Physics. These notes cover magnetic flux, Faraday's law, Lenz's law, motional EMF, inductance, and the AC generator. You can read and download the full notes PDF right here on this page.
Here is what the chapter is worth in the main exams. Use it to decide how much time to spend.
- CBSE Boards: about 5 marks each year, usually one derivation plus one short-answer question.
- JEE Main: around 3 to 4 percent weightage, mostly on derivations and numericals.
- NEET: 1 to 2 questions every year, often a simple Lenz's law or eddy-current MCQ.
Topic-by-Topic Summary for Class 12 Physics Chapter 6
The chapter splits into 6 small blocks. Each block below shows its usual CBSE mark value.
- Magnetic flux: 1 mark on phi = B A cos theta.
- Faraday's law of induction: 3-mark derivation of EMF = minus d(phi)/dt.
- Lenz's law: 2 marks on the direction of induced current.
- Motional EMF: 3 marks on EMF = B l v.
- Self and mutual inductance: 5-mark derivation of L and M for solenoids.
- AC generator: 3 marks on EMF = N A B omega sin(omega t).
Electromagnetic Induction Class 12 Video Lecture
Source: Magnet Brains on YouTube
The table below lists every formula you need for the chapter. The same list sits on the cover of the notes PDF for quick revision.
Faraday's law: induced EMF from changing flux.
Class 12 Physics Chapter 6 All Formulas Quick-Reference Table
| Concept | Formula | SI Unit |
|---|---|---|
| Magnetic flux | phi = B A cos theta | weber |
| Faraday's law | EMF = minus d(phi)/dt | volt |
| Motional EMF | EMF = B l v | volt |
| Self inductance (solenoid) | L = mu_0 N² A / l | henry |
| EMF in inductor | EMF = minus L dI/dt | volt |
| Mutual inductance | M = mu_0 N_1 N_2 A / l | henry |
| Energy stored in inductor | U = (1/2) L I² | joule |
| AC generator EMF | EMF = N A B omega sin(omega t) | volt |
Full formula sheet with derivations: Class 12 Physics Chapter 6 Formula Sheet
Class 12 Physics Chapter 6 All Derivations Index Table
These 5 derivations carry most of the marks. Each one is worked out in full in the notes PDF.
| Derivation | Marks (CBSE) |
|---|---|
| Faraday's law from flux argument | 3 |
| Motional EMF for sliding rod | 3 |
| Self-inductance of long solenoid | 5 |
| Mutual inductance between coaxial solenoids | 5 |
| AC generator EMF | 3 |
Electromagnetic Induction Weightage Across Class 12 Physics Chapters
The table below shows how Chapter 6 weightage sits next to the other chapters. 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 |
Electromagnetic Induction Previous Year Questions Weightage
The table below maps the CBSE Board, JEE Main, and NEET appearances of Chapter 6 over the last six sessions.
| Year | CBSE Board | JEE Main | NEET |
|---|---|---|---|
| 2026 | Mutual inductance of coaxial solenoids (5 marks) | Self-inductance of long solenoid (4 marks) | Faraday's law and induced EMF (1 question) |
| 2025 | Faraday's law statement and EMF calculation (3 marks) | Motional EMF on a rotating rod | Lenz's law direction MCQ |
| 2024 | Lenz's law application (3 marks) | Mutual inductance between solenoids | Eddy currents MCQ |
| 2023 | Self-inductance of long solenoid (3 marks) | EMF in square coil in changing field | Faraday's law direction |
| 2022 | Eddy currents and electromagnetic damping (2 marks) | AC generator EMF derivation | Motional EMF problem |
| 2021 | - | Mutual inductance numerical | - |
Take a look at the most common mistakes before the section image below.
Do and don't for Lenz's law and induced-current direction.
Common Mistakes in Electromagnetic Induction
Mistake 1: Skipping the unit-balance step. CBSE markers give marks for showing dimensional consistency.
Mistake 2: Mixing up scalars and vectors. Add scalars directly, but add vectors as components.
Mistake 3: Forgetting the minus sign in Lenz's law. State the sign and the direction clearly.
Mistake 4: Putting in numbers too early. Keep the answer in symbols until the last step.
Each slip costs 1 to 2 marks.
How to Revise Class 12 Chapter 6 Electromagnetic Induction in 2 Hours
- 0 to 30 min: Magnetic flux and Faraday's law. Solve 2 numericals.
- 30 to 60 min: Lenz's law and motional EMF.
- 60 to 90 min: Self and mutual inductance block.
- 90 to 120 min: Run through the 8-formula table and the 5-derivation index.
Student Feedback
What 11,920 Class 12 Physics students told us about these Chapter 6 notes:
- 69% of students marked the mutual inductance derivation as the trickiest sub-topic.
- 57% said the Lenz's law direction step confused them on at least one class test.
- 4 out of 5 students revised Faraday's law from flux the night before boards.
- Most students took about 5 hours for first read and 2.4 hours for revision.
Source: 2025-26 Class 12 Physics student poll, 11,920 students from CBSE schools in 16 states.
Other Resources for Class 12 Physics Chapter 6 Electromagnetic Induction
| Resource | Link |
|---|---|
| Notes | Electromagnetic Induction Notes |
| NCERT Solutions | Electromagnetic Induction NCERT Solutions |
| Formula Sheet | Electromagnetic Induction Formula Sheet |
| NCERT Book PDF | Electromagnetic Induction NCERT Book PDF |
| Exemplar Book PDF | Electromagnetic Induction Exemplar Book PDF |
| Exemplar Solutions | Electromagnetic Induction Exemplar Solutions |
| Handwritten Notes | Electromagnetic Induction Handwritten Notes |
NCERT Notes for Class 12 Physics: All Chapters
| Chapter | Resource |
|---|---|
| Chapter 1 | Electric Charges and Fields Notes |
| Chapter 2 | Electrostatic Potential and Capacitance Notes |
| Chapter 3 | Current Electricity Notes |
| Chapter 4 | Moving Charges and Magnetism Notes |
| Chapter 5 | Magnetism and Matter Notes |
| Chapter 6 | Electromagnetic Induction Notes |
| Chapter 7 | Alternating Current Notes |
| Chapter 8 | Electromagnetic Waves Notes |
| Chapter 9 | Ray Optics and Optical Instruments Notes |
| Chapter 10 | Wave Optics Notes |
| Chapter 11 | Dual Nature of Radiation and Matter Notes |
| Chapter 12 | Atoms Notes |
| Chapter 13 | Nuclei Notes |
| Chapter 14 | Semiconductor Electronics Notes |
Class 12 Physics Chapter 6 Electromagnetic Induction Notes FAQs
Ques. What are the main topics in Class 12 Physics Chapter 6 notes?
Ans. The notes cover magnetic flux, Faraday's law, Lenz's law, motional EMF, self and mutual inductance, and the AC generator.
Ques. What are the most-asked derivations in this chapter?
Ans. Five derivations carry most marks: Faraday's law from flux, motional EMF for a sliding rod, self-inductance of a long solenoid, mutual inductance of coaxial solenoids, and the AC generator EMF.
Ques. How many formulas are in the Chapter 6 notes?
Ans. Eight formulas cover every numerical in the chapter. The Quick-Reference Table above lists them with units.
Ques. What is the weightage of Class 12 Physics Chapter 6?
Ans. Chapter 6 carries about 5 marks in CBSE, 3 to 4 percent in JEE Main, and 1 to 2 questions per year in NEET.
Ques. Where can I download the Chapter 6 notes PDF?
Ans. You can read and download the notes PDF directly from the card at the top of this page. It covers all 8 formulas, 5 derivations, and worked numericals.
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