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Megnetisam

ICSE · Class 9 · Physics

Complete topic list for Megnetisam in ICSE Class 9 Physics. Key concepts, sub-topics, and what to focus on for board exams.

43 questions35 flashcards5 concepts

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A diagram showing a bar magnet suspended by a silk thread, aligning itself with the geographic north-south direction. The north pole of the magnet points towards geographic north, and the south pole t
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4 Topics · ICSE Class 9 Physics

Topics in Megnetisam

1

1. Basic Ideas About Magnets

  • Lodestone is a natural magnet and is an ore of iron oxide, Fe3O4, found in Magnesia, Asia Minor.
  • The word magnet has been derived from magnesia.
  • Lodestone attracts small pieces of iron and sets itself along a definite direction when suspended freely.
2

2. Induced Magnetism

  • When an unmagnetised magnetic material is kept near or in contact with a magnet, it becomes magnetised temporarily.
  • The magnetism produced in this way is called induced magnetism.
  • A magnetic pole induces opposite polarity on the near end and similar polarity on the farther end of an iron bar.
3

3. Magnetic Field and Field Lines

  • The space around a magnet in which the needle of a compass rests in a direction other than the geographic north-south direction is called the magnetic field of the magnet.
  • Magnetic field is a vector quantity.
  • The magnitude of magnetic field at a point is measured by the force experienced by a magnetic pole placed there.
4

4. Earth as a Magnet and Neutral Points

  • The earth behaves like a huge bar magnet at its centre.
  • The magnetic south pole of the earth lies near the geographic north, and the magnetic north pole lies near the geographic south.
  • The magnetic axis of the earth makes an angle of 17° with the axis of rotation of the earth.

Key Concepts

Central concept: Magnetism

Natural magnetsArtificial magnetsMagnetic polesInduced magnetismMagnetic fieldMagnetic field linesEarth's magnetismNeutral points

Frequently Asked Questions

What are the important topics in Megnetisam for ICSE Class 9 Physics?
Megnetisam covers several key topics that are frequently asked in ICSE Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Megnetisam — ICSE Class 9 Physics?
Understand the core concepts first, then work through the 43 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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All 10 chapters — ICSE Class 9 Physics Syllabus

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