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Chapter Summary

Magnetic Classification of Substances

ICSE · Class 12 · Physics

Summary of Magnetic Classification of Substances for ICSE Class 12 Physics. Key concepts, important points, and chapter overview.

44 questions28 flashcards5 concepts

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Overview

Magnetic behaviour of matter is classified into diamagnetic, paramagnetic, and ferromagnetic types. These classes are described through magnetisation, magnetic intensity, magnetic induction, susceptibility, and permeability. Diamagnetic substances are feebly magnetised opposite to the applied field,

Key Concepts

These substances are feebly magnetised opposite

These substances are feebly magnetised opposite to the magnetising field, so they are repelled by a magnet. Their susceptibility is small and negative

These substances are feebly magnetised

These substances are feebly magnetised in the direction of the magnetising field, so they are weakly attracted by a magnet. Their susceptibility is sm

These substances are strongly magnetised

These substances are strongly magnetised in the direction of the magnetising field and strongly attracted by a magnet. Their susceptibility is very la

Magnetic induction is the magnetic flux

Magnetic induction is the magnetic flux density inside a magnetised substance. It is a vector quantity. Its SI unit is tesla, and 1 gauss equals 10^-4

Magnetic intensity measures the capability

Magnetic intensity measures the capability of the magnetising field to magnetise a substance. It is given by H = B/mu0 - M and has SI unit A m^-1. In

Learning Objectives

  • Classify substances as diamagnetic, paramagnetic, or ferromagnetic using their magnetic response.
  • Understand magnetic induction, magnetisation, magnetic intensity, permeability, relative permeability, and susceptibility.
  • Use the relations between B, H, M, chi m, and mu r correctly with units.
  • Explain the temperature dependence of diamagnetic, paramagnetic, and ferromagnetic substances.
  • Describe domain theory and the origin of ferromagnetism.

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 Magnetic Classification of Substances - Concept Overview, Mind map showing the three main classifications of magnetic substances and their key characteristics with examples, Flowchart showing the mechanism of diamagnetism from atomic structure to macroscopic repulsion. These are the concepts ICSE Class 12 examiners draw on most — study them first, then practise related questions.
How to score full marks in Magnetic Classification of Substances — ICSE Class 12 Physics?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and 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.

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