3 What do you mean by north and south pole of the magnet? each other. 4. Unlike poles are each other and like poles are 5. Give some methods of making mgnets? 6. Write the uses of magnets? 7. Why is it recommended that magnets be stored with keepers? 8. What is magnetic field? 9. Name the instrument that is used a magnet to find the direction. 10. How will you experimentally show that there are two regions in a magnet where its magnetic strength is concentrated? 11. Will astrong magnet attract a piece of copper? why? 12 State the rule of attraction and repulsion between two magnets? 13. Why does a freely suspended magnetbpoint in the north-southbdirections? 14. What will happen to the poles of a magnet if it is broken into two? 15. One precaution you should always take while handling a magnet is not to drop it. Why? 16.Exercise-A.B.
Answers
3. The end that faces the north is called the north-seeking pole, or north pole, of the magnet. The other end is called the south pole. When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another
4. like poles repel each other
5. Magnets are made by exposing ferromagnetic metals like iron and nickel to magnetic fields. There are three methods of making magnets: (1) Single touch method (2) Double touch method (3) Using electric current.
6. Magnets are used in magnetic compass, doorbells, refrigerators.
Magnets are used in dynamos, motors, loudspeakers, microphones etc.
Ceramic magnets are used in computers.
Magnets are used in toys to give a magic effect.
7.magnets Must be kept with magnetic keepers becouse the magnetic keepers help prevent the Magnet from Loosing its magnetism. It is placed across the poles of a permanent magnet to help preserve the strength of the magnet by completing the magnetic circuit.