Uploaded byVidya Venkataramanan
Fun with magnets by Bhagya
This document discusses different types of magnets such as bar magnets, ring magnets, and cylindrical magnets. It explains that magnets have north and south poles and that unlike poles attract while like poles repel. Some uses of magnets include in credit cards, TV/computer screens, and data storage devices. Magnets can lose their magnetism if exposed to impacts, heat, or other stresses.
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Fun with magnets by Bhagya
- 2. AFTER SEEING THISPICTURE CAN YOU UNDERSTAND WHAT ARE WE GOING TO DO
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- 4. WHAT IS AMAGNET? • Magnets are made of materials that attract objects made of certain substances such as iron , cobalt, and nickel.
- 5. DIFFERENT TYPES OFMAGNETS • HORSESHOE MAGNET
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- 9. POLES OF ABAR MAGNET • When iron fillings are brought close to a magnet, they do not stick evenly to all parts of the magnet. The stick more on certain parts of the magnet. These are called the poles of of the magnet. These are, by convention, called the NORTH POLE and the SOUTH POLE. The two poles cannot exist independently. That is, they always come in pairs. If we break a bar magnet in the middle, we would get two pieces,
- 10. each having anorth pole and south pole.
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- 12. REPULSION • WHEN POLES(N-N) OR (S-S) ARE KEPT TOGETHER THEY REPEL. THIS IS KNOWN AS REPULSION.
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- 14. ATTRACTION • WHEN (N-S)ARE KEPT TOGETHER THEY ATTRACT. THIS IS KNOWN AS ATTRACTION.
- 15. USES OF MAGNETS •1 ; Credit cards • 2; Television and computer moniters • 3; Computer hard discs and audio and video cassettes.
- 16. LOSS OF MAGNETISIM • A magnet can lose it’s magnetism when • Someone throws it from a height • Hitting with a hammer • Applying heat