magnts and its fun for the students f class vi - Copy.pptx

magnts and its fun for the students f class vi - Copy.pptx

1. CHAPTER FUN WITH MAGNETS

2. Learning objective The students will recognize the application of magnets in our day to day life. The students will learn about the discovery of magnets. They will be able to differentiate between natural and artificial magnet as well as between magnetic and non magnetic materials. They will learn about different types of artificial magnet. They will be able to learn about the effect of magnet with the help of an experiment. The students will also learn about the various properties of a bar magnet. The students will learn about the stroking method. They will also learn about precautionary measures to avoid demagnetization. They will also learn how to store of magnets.

3. INTRODUCTION

4. DISCOVERY OF MAGNETS According to Greek legend, magnetism was first discovered by a shepherd named Magnes , who lived in Magnesia, Greece. Magnes was herding his sheep through the mountains. Suddenly he noticed the ferrule of his stick and nails in his sandals got stuck to a rock. The iron in his stick and nails had become attracted to the magnetic rock. The rock was named as magnetite, after the name of the shepherd or the country it was found in. It was also known as a loadstone because of its attractive properties. Magnetite gets attracted to  magnets  and can be easily magnetized to form a permanent magnet. Naturally magnetized pieces of magnetite are called loadstone. Loadstone

5. Types of MAGNETS Example: lodestone Example: bar magnet

6. Artificial magnets Bar magnet U shaped magnet Ball ended magnet Cylindrical magnet

7. Effect of magnet – a paper clip hanging in air

8. MAGNETIC AND NON MAGNETIC MATERIALS MAGNETIC MATERIALS The materials which get attracted towards a magnet are magnetic materials. Example: iron, cobalt, nickel. NON MAGNETIC MATERIALS The materials which are not attracted towards a magnet are non magnetic materials. Example: paper, plastic, soil, fabric etc.