Everything you need for this topic on one page: the ideas, the formulas, the traps, and free lectures that explain it well.
Last updated: 26 October 2026
Biot–Savart and Ampère's laws, force on moving charges and currents, motion in magnetic fields, galvanometers and magnetic materials.
Printable Magnetic Effects of Current and Magnetism formula sheet: formulas, key ideas and traps on one page. Save it as a PDF for offline revision.
Appears in almost every JEE Main shift. Usually 2 questions. Field at the centre of arcs and loops and charged-particle motion are favourites.
Prerequisites: Electrostatics (Electric Charges and Fields, Potential).
Chapter names follow the current rationalised NCERT textbooks. Read these sections before solving PYQs.
| Class | Book | Chapter | Sections JEE asks from |
|---|---|---|---|
| Class 12 | Physics Part I | Moving Charges and Magnetism | Magnetic force on a current-carrying conductor; Motion in a magnetic field; Ampere's circuital law; The solenoid and the toroid; Force between two parallel currents |
| Class 12 | Physics Part I | Magnetism and Matter | The bar magnet; Magnetism and Gauss's law; Magnetisation and magnetic intensity; Magnetic properties of materials |
Full-chapter free lectures picked from YouTube search results by views, from established JEE channels (mostly in Hinglish). Use the subtopic list to jump straight to the part you need (timestamps come from each video's own chapter list). Watch one, then solve PYQs the same day.
Appears in almost every JEE Main shift. It is part of the official 'Magnetic Effects of Current and Magnetism' unit in the JEE Main 2027 syllabus.
Long wire: B = μ₀I / 2πr; circular loop centre: μ₀I / 2R; Solenoid: B = μ₀nI; Radius r = mv/qB, period T = 2πm/qB.
Understand the key ideas from NCERT or one full lecture, learn the formula sheet, then solve 25–30 past JEE questions on the topic. Usually 2 questions. Field at the centre of arcs and loops and charged-particle motion are favourites.
