Get the Moving Charges and Magnetism NCERT PDF below, freshly aligned to the 2026-27 CBSE syllabus revision. The Moving Charges and Magnetism NCERT PDF on this page is the official NCERT Part-I chapter for Moving Charges and Magnetism, with every section retained after the latest NCERT rationalisation. Use the Moving Charges and Magnetism NCERT PDF alongside the section map and 6-mark weightage chart further down.
- CBSE Weightage: 5 to 7 marks
- JEE Main Weightage: 3 to 4% (2 to 3 questions per paper)
- NEET Weightage: 2 to 3 questions per year
Both downloads of the Moving Charges and Magnetism NCERT PDF on this page are free and updated for the 2026-27 NCERT syllabus.
This NCERT Book PDF is curated by subject experts, mapped to the 2026-27 rationalised NCERT, and refined against the last five years of CBSE Board, JEE Main, and NEET papers.
Also Check:
- Moving Charges and Magnetism Class 12 Physics NCERT Solutions
- Moving Charges and Magnetism Class 12 Physics Notes
How will the Moving Charges and Magnetism NCERT PDF on Collegedunia Help You?
The verified chapter PDF here is the same file NCERT publishes for the 2026-27 academic session, with additional reading guidance layered on top.
- Verified 2026-27 NCERT Source: Every page matches the latest NCERT print, with no off-syllabus inserts and no missing intext Examples.
- Section-by-Section Navigation: A page-range map lets you jump straight to Biot-Savart, Ampere's law or the galvanometer without scrolling through 42 pages.
- Reading-Order Guidance: A staged "skim, derive, solve" workflow tells you which pages to read on day one, day two and day three of revision.
- Cross-Chapter Bridge: The Collegedunia reading order links Chapter 4 to Chapter 5 and Chapter 6 so you do not re-learn the same dipole and flux ideas twice.
Moving Charges and Magnetism Video Chapter Walkthrough
Source: NCERT Wallah on YouTube
What's Inside the Moving Charges and Magnetism NCERT PDF
The official chapter PDF is structured around a derivation-first sequence. Lorentz force is stated, the Biot-Savart law builds the field of a current, and Ampere's circuital law gives the shortcut for symmetric geometries. Each derivation is followed by a solved examples, and the Exercise set at the end mixes conceptual and numerical questions.
Moving Charges and Magnetism NCERT Section-by-Section Breakdown
The table below maps every section of Chapter 4 to its page range in the official NCERT PDF and the single concept that each section delivers. Use it as a navigation index when you study from the Moving Charges and Magnetism NCERT PDF.
| Section | Title | Pages | Core Concept |
|---|---|---|---|
| 4.1 | Introduction | 132 to 133 | Oersted's experiment, magnetic field as a vector field |
| 4.2 | Magnetic Force | 133 to 137 | Lorentz force F = qE + v × B , force on a current element F = IL × B |
| 4.3 | Motion in a Magnetic Field | 137 to 141 | Circular and helical motion, cyclotron principle |
| 4.4 | Magnetic Field due to a Current Element, Biot-Savart Law | 141 to 145 | dB = 0/4π · I dL × r̂ / r2 , straight-wire field |
| 4.5 | Magnetic Field on the Axis of a Circular Current Loop | 145 to 148 | B = 0 I R2 / 2R2 + x23/2 ; at centre B = 0 I / 2R |
| 4.6 | Ampere's Circuital Law | 148 to 152 | ∮ B · dL = 0 Ienc , application to straight wire |
| 4.7 | The Solenoid | 152 to 155 | Ideal solenoid field B = 0 n I , toroid as bent solenoid |
| 4.8 | Force Between Two Parallel Currents, the Ampere | 155 to 158 | F/L = 0 I1 I2 / 2π d , SI definition of the ampere |
| 4.9 | Torque on Current Loop, Magnetic Dipole | 158 to 162 | τ = m × B , m = NIA , potential energy U = -m · B |
| 4.10 | The Moving Coil Galvanometer | 162 to 166 | φ = NABI/k , current and voltage sensitivity, ammeter or voltmeter conversion |
Sections 4.4, 4.6 and 4.9 carry the heaviest derivation weight and feature in almost every CBSE 5-marker. Sections 4.3 and 4.10 typically appear as 3-mark numericals or short derivations.
Moving Charges and Magnetism Intext Example Inventory
The 12 solved examples sit immediately after each derivation in the Moving Charges and Magnetism NCERT PDF. Solve them before attempting the Exercise set; they map directly to recurring CBSE question phrasings.
| Example | Sub-topic | What it Covers |
|---|---|---|
| 4.1 | Lorentz force direction | Vector cross product, right-hand rule |
| 4.2 | Cyclotron radius and frequency | Substitution in r = mv/qB , f = qB/2π m |
| 4.3 | Helical motion pitch | Velocity decomposition parallel and perpendicular to B |
| 4.4 | Biot-Savart for a finite straight wire | Integration with angular limits |
| 4.5 | Field at centre of a circular loop | Direct application of B = 0 I / 2R |
| 4.6 | Field on the axis of a loop | Substitution at given x along the axis |
| 4.7 | Ampere's law for a long straight wire | Choice of Amperian loop, symmetry argument |
| 4.8 | Field inside a solenoid | Counting turns enclosed by the Amperian rectangle |
| 4.9 | Force between parallel currents | Sign of force, attraction versus repulsion |
| 4.10 | Torque on a rectangular loop | τ = NIAB sinθ with the correct angle |
| 4.11 | Galvanometer to ammeter conversion | Shunt resistance calculation |
| 4.12 | Galvanometer to voltmeter conversion | Series resistance calculation |
How to Read the Moving Charges and Magnetism NCERT PDF (Pass-Sequence Plan)
The 42-page chapter rewards a three-pass reading rather than a single linear read. Each pass targets a different cognitive load.
- Pass 1 (skim, 30 minutes): Read only the section headings, the boxed definitions and the figure captions. Build a mental table of contents.
- Pass 2 (derivations, 90 minutes): Work through sections 4.4, 4.5, 4.6 and 4.9 with pen and paper, redoing each derivation step yourself.
- Pass 3 (Examples, 60 minutes): Solve all 12 intext Examples without looking at the step-by-step solutions first, then verify.
- Pass 4 (Exercises, 2 to 3 hours): Attempt the 28 Exercise problems in two sittings; the last six are JEE-style and benefit from a fresh head.
Multi-Day Study Plan for the Chapter 4 NCERT PDF
If you have three study days for Moving Charges and Magnetism, the split below balances theory, derivation practice and numerical solving without overloading any single session.
| Day | NCERT Sections | Outcome | Time |
|---|---|---|---|
| Day 1 | 4.1, 4.2, 4.3 plus Examples 4.1 to 4.3 | Lorentz force, cyclotron, helical motion locked in | 2.5 hours |
| Day 2 | 4.4, 4.5, 4.6, 4.7 plus Examples 4.4 to 4.8 | Biot-Savart, loop field, Ampere's law and solenoid derived | 3 hours |
| Day 3 | 4.8, 4.9, 4.10 plus Examples 4.9 to 4.12 and Exercise 4.1 to 4.28 | Force between wires, torque, galvanometer, full exercise set | 3 hours |
Compress to two days if you have already covered Lorentz force in coaching; merge Day 1 and Day 2 and keep Day 3 as is. Collegedunia recommends the three-day split for first-time readers.
Cross-Chapter Reading Order: Chapter 4, 5 and 6 as a Cluster
Chapters 4, 5 and 6 form a tight magnetism cluster. The dipole moment m = NIA introduced in section 4.9 reappears as the bar-magnet moment in Chapter 5, and the field B computed via Biot-Savart in section 4.4 becomes the input to the flux Φ = ∫ B · dA in Chapter 6. Reading the three chapters in sequence, in that order, cuts revision time substantially.
| Concept from Ch 4 | Used in Ch 5 Magnetism and Matter | Used in Ch 6 Electromagnetic Induction |
|---|---|---|
| Field B from a current (Biot-Savart, Ampere) | Compared with bar-magnet field to define equivalent dipole moment | The B linking a coil sets the flux Φ = ∫ B · dA |
| Magnetic dipole moment m = NIA | Extended to atomic moments and the Bohr magneton | Rotating loop in B produces induced emf (generator) |
| Solenoid field B = 0 n I | Solenoid treated as equivalent bar magnet, defines magnetisation M | Self-inductance L = 0 n2 A l |
| Torque τ = m × B on a loop | Torque on a bar magnet, energy U = -m · B | Same torque opposes motion in a generator (Lenz's law) |
| Force F = qv × B on a moving charge | Microscopic origin of diamagnetism and paramagnetism | Motional emf ε = Blv derived from this force |
Related Links:
2026-27 NCERT Edition: What Changed for Chapter 4
The current 2026-27 syllabus keeps the chapter intact end to end. Sections 4.1 through 4.10 remain, the Biot-Savart, Ampere and torque derivations are unchanged, and the moving coil galvanometer is retained as a full sub-section. A few historical asides were shortened, but no Example and no Exercise problem was removed.
For the full chapter-wide rationalisation map across all 14 Physics chapters, see the dedicated Collegedunia rationalisation tracker linked from the Notes page.
Moving Charges and Magnetism Top Formulae for Quick Reference
The eight formulae below cover roughly 90 percent of numerical questions set on Chapter 4 in CBSE, JEE and NEET. The complete master sheet with dimensional checks and a when-to-use decision tree sits on the dedicated Collegedunia Formula Sheet.
| Quantity | Formula |
|---|---|
| Lorentz force on a charge | F = qv × B |
| Force on a current-carrying conductor | F = I L × B |
| Biot-Savart law | dB = 0/4π · I dL × r̂ / r2 |
| Field of a long straight wire | B = 0 I / 2π r |
| Field at centre of a circular loop | B = 0 I / 2R |
| Field inside a long solenoid | B = 0 n I |
| Force per unit length between parallel currents | F/L = 0 I1 I2 / 2π d |
| Torque on a current loop | τ = NIA × B |
Full master sheet: Moving Charges and Magnetism Class 12 Physics Formula Sheet
Most Recurring PYQ Topics from Chapter 4
Three question stems repeat almost every year across CBSE, JEE Main and NEET. The full year-wise PYQ map (2021 to 2026) with question text and marks tags is maintained on the NCERT Solutions page.
- Biot-Savart or Ampere's law derivation for a solenoid: CBSE 2025 5-marker, JEE Main 2025 numerical, CBSE 2022 3-marker.
- Cyclotron principle, frequency and radius: JEE Main 2024, NEET 2024, CBSE 2023 3-marker.
- Torque on a current loop and dipole moment: CBSE 2023, CBSE 2022, NEET 2023.
Full year-wise PYQ map: Moving Charges and Magnetism NCERT Solutions
More Moving Charges and Magnetism Physics Class 12 Resources
NCERT Book PDF for Class 12 Physics: All Chapters
Other Class 12 Physics NCERT Book PDFs you can grab as free downloads:
| Chapter | Resource |
|---|---|
| Chapter 1 | Electric Charges and Fields NCERT PDF |
| Chapter 2 | Electrostatic Potential and Capacitance NCERT PDF |
| Chapter 3 | Current Electricity NCERT PDF |
| Chapter 5 | Magnetism and Matter NCERT PDF |
| Chapter 6 | Electromagnetic Induction NCERT PDF |
| Chapter 7 | Alternating Current NCERT PDF |
| Chapter 8 | Electromagnetic Waves NCERT PDF |
| Chapter 9 | Ray Optics and Optical Instruments NCERT PDF |
| Chapter 10 | Wave Optics NCERT PDF |
| Chapter 11 | Dual Nature of Radiation and Matter NCERT PDF |
| Chapter 12 | Atoms NCERT PDF |
| Chapter 13 | Nuclei NCERT PDF |
| Chapter 14 | Semiconductor Electronics NCERT PDF |
Moving Charges and Magnetism NCERT PDF: available above as a free PDF download, fully aligned to the 2026-27 NCERT release.
Moving Charges and Magnetism NCERT PDF - Frequently Asked Questions
Ques. Where can I download the Moving Charges and Magnetism NCERT PDF for free?
Ans. You can download the Moving Charges and Magnetism Ncert Pdf directly from this page. Both the Normal and HD versions are available, and both are free.
Ques. Is this Moving Charges and Magnetism NCERT PDF aligned with the 2026-27 CBSE syllabus?
Ans. Yes. This page reflects the current 2026-27 syllabus for Class 12 Physics. Sections 4.1 through 4.10 are retained in full, with the Biot-Savart, Ampere's law, solenoid, parallel-wire force, torque on a loop and moving coil galvanometer derivations all intact.
Ques. How many pages is the Class 12th Physics Moving Charges and Magnetism NCERT Book PDF?
Ans. The chapter PDF runs approximately 42 pages and covers Lorentz force, motion in a magnetic field, Biot-Savart law, Ampere's circuital law, solenoid, torque on a current loop and the moving coil galvanometer, with 12 intext Examples and 28 Exercise problems.
Ques. How is Chapter 4 best read for CBSE Class 12 boards?
Ans. Use a three-pass strategy: skim headings and figures first, redo the four major derivations (Biot-Savart, loop field, Ampere's law, torque) with pen and paper second, and solve the 12 intext Examples plus the 28 Exercise problems last. The full chapter can be completed in 4 to 5 hours of focused work.
Ques. Which sections of Chapter 4 are most important for JEE Main and NEET?
Ans. Sections 4.3 (cyclotron), 4.4 (Biot-Savart), 4.6 (Ampere's law) and 4.9 (torque on a current loop) carry the heaviest weight. Together they account for the majority of JEE Main and NEET questions set on this chapter in the last five years.
Ques. How does Chapter 4 link to Chapter 5 and Chapter 6 in the NCERT?
Ans. Chapter 4 builds the field B from currents and introduces the magnetic dipole moment. Chapter 5 reuses the dipole picture for bar magnets and atomic moments. Chapter 6 uses the same B to define magnetic flux and then derives induced emf. Reading the three chapters in sequence reduces revision time substantially.
Ques. How many intext Examples and Exercise problems are inside Chapter 4?
Ans. The chapter contains 12 fully solved intext Examples placed immediately after each derivation, plus 28 Exercise problems at the end. Two short appendices cover the Ampere's law derivation and helical motion in detail.
Ques. Is the Moving Charges and Magnetism chapter scoring for CBSE Class 12 Physics?
Ans. Yes. The chapter carries 5 to 7 marks in the CBSE board paper and the questions are largely formulaic, drawing on a small set of derivations and numerical patterns. Students who memorise the right-hand rule conventions and the eight core formulae routinely score 6 out of 7 on this chapter.
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