Physics
Magnetism for JEE Main & Advanced — Biot-Savart, Ampere, and force on current
Why magnetism is a high-frequency topic on both papers and how to standardise field calculations.
On JEE Main
Main tests Biot-Savart and Ampere's law for standard geometries, force between parallel currents, torque on a current loop, and moving charge in a magnetic field in single-correct MCQ format.
On JEE Advanced
Advanced uses multi-correct and integer formats with non-standard current distributions, combined electric and magnetic field motion (velocity selector, cyclotron), and magnetic force on oddly shaped current loops. Integer-type questions require integrating the Biot-Savart law over a curved segment.
How to practise
Use PracticeJEE's Magnetism topic after electrostatics and current electricity for a natural E&M progression.
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