Skip to main content
Super TutorResources
Chapter 19 of 32
Revision Notes

Magnetic Classification of Substances — Revision Notes

ICSE · Class 12 · Physics

Magnetic Classification of Substances revision notes for ICSE Class 12 Physics: 4 topics in quick points. Part of the ICSE Class 12 Physics syllabus.

44 questions28 flashcards7 formulas & key relations5 concepts

Interactive on Super Tutor

Studying Magnetic Classification of Substances? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.

Try Super Tutor — Free

Free trial, no card needed.

Key Topics to Revise

1

1. Classification of Magnetic Substances

  • All substances, including solids, liquids, and gases, fall into diamagnetic, paramagnetic, or ferromagnetic classes.
  • Every substance is fundamentally diamagnetic, but in paramagnetic and ferromagnetic substances this property is masked by the stronger magnetic effect.
  • Diamagnetic substances are feebly magnetised opposite to the magnetising field and are repelled by a magnet.
2

2. Magnetic Induction, Magnetisation, and Magnetic Intensity

  • Magnetic induction B is the magnetic flux density inside a magnetised substance.
  • SI unit of B is tesla; CGS unit is gauss, and 1 G = 10^-4 T.
  • Magnetisation M is the magnetic moment per unit volume of a magnetised substance.
3

3. Properties of Dia-, Para-, and Ferromagnetic Substances

  • A freely suspended diamagnetic rod sets itself perpendicular to the magnetic field.
  • A freely suspended paramagnetic rod sets itself parallel to the magnetic field.
  • A diamagnetic substance moves from stronger to weaker regions of a non-uniform magnetic field.
4

4. Atomic Explanation of Magnetism

  • Electron spin is the main source of atomic magnetic moment; orbital motion contributes very little.
  • Diamagnetic substances generally have atoms, ions, or molecules with paired electrons and zero net magnetic moment.
  • When a diamagnetic substance is placed in a field, the induced moment is opposite to the field because of the Lenz-law effect.

Get complete notes with diagrams and examples

Full Notes

Key Concepts

These substances are feebly magnetised oppositeThese substances are feebly magnetisedThese substances are strongly magnetisedMagnetic induction is the magnetic fluxMagnetic intensity measures the capability

Frequently Asked Questions

What are the important topics in Magnetic Classification of Substances for ICSE Class 12 Physics?
Key topics in Magnetic Classification of Substances include Classification of Magnetic Substances, Magnetic Induction, Magnetisation, and Magnetic Intensity, Properties of Dia-, Para-, and Ferromagnetic Substances, Atomic Explanation of Magnetism. Study these first, then practise questions on each for the ICSE Class 12 board exam.
How should I revise Magnetic Classification of Substances for the ICSE Class 12 board exam?
Learn the core ideas first, then work through the 44 practice questions on Magnetic Classification of Substances. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Magnetic Classification of Substances

All ICSE Class 12 Physics Revision Notes

For serious students

Get the full Magnetic Classification of Substances chapter — start free.

Quizzes, flashcards, an AI doubt solver and a study plan for ICSE Class 12 Physics. Free to start, no card needed.

Try Super Tutor Free
Try this chapter free