Chapter 5: Magnetism and Matter
NCERT Class 12 Physics, Part I, Chapter 5. 5 lessons, 12 narrated 3D videos, 6 simulations and 10 quiz questions, following the textbook section by section.
- The bar magnetPlace a bar magnet under a sheet of paper and sprinkle iron filings on top. Tap the paper gently. The filings arrange themselves into curves that run from one end of the…
- Magnetism and Gauss’s lawDraw a closed surface around the north pole of a bar magnet, like a soap bubble that encloses just that end. Now count the field lines that cross the bubble.
- Magnetisation and magnetic intensityZoom into an atom. Electrons orbit the nucleus, and each electron also spins. Each of these motions is a tiny current loop, so an atom can have a tiny magnetic moment.
- Magnetic properties of materialsBring a strong magnet near an iron nail, a piece of aluminium, and a piece of bismuth. The nail jumps to the magnet. The aluminium is pulled, but only very weakly. The…
- The Earth’s magnetismThis is an extra topic. The Earth’s magnetism is not in the current NCERT syllabus, but it was in the older textbook, and it is useful for competitive exams and for…