Chapter-Chapter 4. Exploring Magnets Science Curiosity class 6 in english Medium CBSE Notes

Chapter 4. Exploring Magnets

Magnets are among the most fascinating discoveries in science. They have the unique ability to attract certain materials without touching them. From simple refrigerator doors to electric motors and magnetic compasses, magnets play an important role in our daily lives. In this chapter, you will learn about magnetic and non-magnetic materials, different types of magnets, magnetic poles, the properties of magnets, the Earth's magnetism, and the various uses and care of magnets.

CBSE Notes - Key Points

This section provides the most important keywords, definitions, scientific terms, facts, and revision points from the chapter. It is useful for quick revision before school examinations and CBSE assessments.

Important Keywords

• Magnet
• Magnetism
• Magnetic Materials
• Non-Magnetic Materials
• Natural Magnet
• Artificial Magnet
• Lodestone
• Bar Magnet
• Horseshoe Magnet
• Ring Magnet
• Disc Magnet
• North Pole
• South Pole
• Magnetic Pole
• Magnetic Compass
• Magnetic Needle
• Magnetic Field
• Earth's Magnetism
• Attraction
• Repulsion
• Matsya Yantra

Important Definitions

Magnet: A magnet is an object that attracts magnetic materials such as iron, nickel, and cobalt.

Magnetism: The property by which a magnet attracts certain materials is called magnetism.

Magnetic Materials: Materials that are attracted by a magnet are called magnetic materials.

Non-Magnetic Materials: Materials that are not attracted by a magnet are called non-magnetic materials.

Natural Magnet: A naturally occurring magnet found in nature is called a natural magnet or lodestone.

Artificial Magnet: A man-made magnet prepared in different shapes for various purposes is called an artificial magnet.

Magnetic Pole: The two ends of a magnet where the magnetic force is strongest are called magnetic poles.

Magnetic Compass: A magnetic compass is an instrument used to find directions with the help of a freely rotating magnetised needle.

Attraction: The force by which unlike poles of magnets pull each other is called attraction.

Repulsion: The force by which like poles of magnets push each other away is called repulsion.

Scientific Terms

Important Facts

• Magnets attract iron, nickel, cobalt, and some of their alloys.
• Wood, plastic, rubber, glass, paper, and cloth are non-magnetic materials.
• Every magnet has two poles—North Pole and South Pole.
• The magnetic force is strongest at the poles of a magnet.
• A single magnetic pole cannot exist independently.
• A freely suspended magnet always comes to rest in the north-south direction.
• The Earth behaves like a giant magnet.
• A magnetic compass works because of the Earth's magnetic field.
• Like poles repel each other, while unlike poles attract each other.
• Repulsion is the surest test to identify a magnet.
• Magnetic force can pass through several non-magnetic materials such as wood, plastic, cardboard, and glass.
• Magnets are used in household appliances, industries, transportation, medicine, and scientific instruments.
• Heating, hammering, or dropping a magnet may reduce its magnetic strength.
• Bar magnets should be stored with soft iron keepers to preserve their magnetism.

Quick Revision

• Magnets attract only magnetic materials.
• Iron, nickel, and cobalt are magnetic materials.
• Every magnet has two poles.
• Magnetic force is maximum at the poles.
• Like poles repel each other.
• Unlike poles attract each other.
• Repulsion is the surest test of a magnet.
• A freely suspended magnet always points in the north-south direction.
• The Earth acts like a giant magnet.
• A magnetic compass is used to find directions.
• Magnetic force can act through some non-magnetic materials.
• Magnets should not be heated, hammered, or dropped.
• Proper storage helps magnets retain their magnetic strength.

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