मराठी
CISCE(English Medium) ICSE Class 9
प्रश्नपत्रिका१०
पाठ्यपुस्तक उत्तरे१९२७३
संकल्पना स्पष्टीकरण आणि व्हिडिओ३२०
अभ्यासक्रम

Magnetic and Non-magnetic Materials

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Topics

  • Introduction
  • Experiment

Introduction:

Magnetic and non-magnetic materials are categorised based on their ability to be attracted by a magnet. The materials that stick to a magnet are called magnetic materials, while those that do not stick to a magnet are called non-magnetic materials. 

  • Magnetic materials, such as iron, nickel, and cobalt, respond to magnetic fields and can be attracted to magnets.
  • Non-magnetic materials, like plastic, wood, glass, and most other substances, do not respond to magnets and are not attracted by them.

Experiment

1. Aim: To identify and classify materials as magnetic or non-magnetic based on their response to a magnet.

2. Requirements

  • A magnet
  • Various everyday objects (coins, paper clips, plastic items, etc.)
  • A saucer containing a mixture of sand, pieces of paper, sawdust, iron filings, and pins

3. Procedure

A. Testing Various Objects:

  • Bring the magnet close to different objects, such as a spoon, coin, or paper clip, and note which ones attract the magnet.
  • Record the material each object is made from (metal, plastic, etc.). Group the objects into two categories:

B. Testing the Mixture:

  • Place the saucer with sand, paper, sawdust, iron filings, and pins on a flat surface.
  • Move the magnet around just above the mixture. Observe which materials are attracted to the magnet.

4. Conclusion

  • Magnetic Materials: objects that stick to the magnet. The iron filings and pins, which are metallic, will be attracted to the magnet, indicating they are magnetic.
  • Non-Magnetic Materials: objects that do not stick to the magnet. Sand, paper, and sawdust will not be attracted to the magnet, showing that they are non-magnetic.

To identify the magnetic materials, we use

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Related QuestionsVIEW ALL [24]

A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. Affect observed in each case is stated in Column I. Possible reasons for the observed affects are mentioned in Column II.

Match the statements given in Column I with those in Column II.

Column I Column II
Boat gets attracted towards the magnet Boat is fitted with a magnet with north pole towards its head
Boat is not affected by the magnet Boat is fitted with a magnet with south pole towards its head
Boat moves towards the magnet if north pole of the magnet is brought near its head Boat has a small magnet fixed along its length
Boat moves away from the magnet when north pole is brought near its head Boat is made of magnetic material
Boat floats without changing its direction Boat is made up non-magnetic material

Distinguish between
Magnetic and non-magnetic materials.

Few iron nails and screws got mixed with the wooden shavings while a carpenter was working with them.How can you help him in getting the nails and screws back from the scrap without wasting his time in searching with his hands?

When the iron needle is rubbed with a bar magnet the needle gets magnetized. But the rubber piece is rubbed with a magnet it will not get magnetized. Why?

Write down the names of substances.

Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.

Rubber is a magnetic material.

Write two methods by which a magnet can be demagnetised.

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