some basic principles of magnetism by lbf

my very 1st demonstration.... @ 10-20-17

1. Some Basic Principles of Magnetism Demonstrator: Lemuel B. Fenomeno

2. M A G N E T I S M

3. Objectives: Identify what are the properties behind magnets. Gain evidence of magnetism through simple experiment. To know the application of magnetism.

4. What is Magnetism? The force of attraction or repulsion of a magnetic material. The study of magnetic fields and their effect on materials.

5. What is a Magnet? A material which exhibits magnetism.

6. General Properties of Magnets Magnets usually have two poles: - North Pole (North Seeking Pole) - South Pole (South Seeking Pole)

7. Magnetic Field The outer part of a magnet where forces are acting upon.

8. 2 TYPES OF MAGNETS 1. Permanent Magnets Objects that are artificially magnetized Exhibits strong magnetic properties

9. Types of Permanent Magnets Neodymium Iron Boron Magnets Alnico Magnets Cerramic Magnets

10. 2. Temporary Magnets They are made by stroke and electric methods. Loses their magnetic properties for a short time Ex: paper clips, nails, thumbtacks, etc.

11. Activity 2 Testing for Evidence of Magnetism Objectives: Identify the forces (attraction/repulsion) between: a. two magnets, and b. a magnet and magnetic/nonmagnetic materials. Distinguish a magnet (permanent or temporary) from a non-magnetic object.

12. Materials: Pair of Magnets 6-10 objects made of different materials from inside the room Safety Precautions: Handle magnets with care so as not to drop those. These might break, chip off, and weaken upon impact. Keep magnets away from computer units screen, memory storage, and the like.

13. Procedure: Table 4. Interaction between two permanent magnets What to do? What happened? Place the magnets with the same sides on the flat horizontal surface . Place the magnets with different sides on the flat horizontal surface. The magnets exhibits repulsion for they repel each other. The magnets exhibits attraction for they attract each other.

14. Table 5. Interaction of a magnet with other objects What to do? What happened ? Mix the available objects you have on a flat surface then place a magnet near them. The objects that are made of metals are attracted to the magnet. The remaining objects are not attracted to the magnet.

15. Guide questions: Q7. What conditions with observable effects make magnets interact with another magnet? Q8. In general, what conditions with observable effects make magnets interact with non-magnetic materials? Magnets that are in good conditions are strong enough to push or pull another magnet close enough to it. Magnets, strong or weak, can be made to attract non-magnetic objects that is made of or has parts that are magnetic in nature such as these made of iron, nickel, cobalt or its alloys.

16. Q9. What type/s of forces can a magnet exert on another magnet? Q10. What type/s of force can a magnet exert on non-magnet objects? Magnets can both attract or repel other magnets. Like poles of magnets when close enough will cause the magnets to repel each other, while unlike poles of magnets that are close will cause the magnets to attract each other. Both poles of the magnet can attract non-magnet objects that have materials or parts that are magnetic in nature.

17. Q11. How will you distinguish magnets from non-magnetized magnetic materials? Only magnets can repel other magnets and already magnetized objects. But non-magnetized objects made of magnetic materials can only be attracted by a magnet.

18. Applications of Magnets Used in giving directions Used in storing information Used in industries

19. Used by hospitals Used for communications Used at homes

20. Let’s Have a Quiz! Multiple choice: Direction: Write the letter of the correct answer. (NRx1) Any magnet has two ends, each one is called a: a. Magnetic Field b. Magnetic Pole c. Magnetized Material d. None of the Above

21. 2. A magnet made of material that keeps its magnetism is known as: a. Lifetime Magnet b. Energizer Bunny Magnet c. Permanent Magnet d. Temporary Magnet 3. The lines that map out the magnetic field around a magnet are: a. Magnetic Field Lines b. Magnetic Pole Lines c. Magnetism d. Magnet

22. 4. If two magnets were in this order: NS NS they would: a. Repel b. Attract c. Do nothing d. None of these 5. If two magnets were in this order: NS SN they would: a. Repel b. Attract c. Do nothing d. None of these

23. ANSWERS 1. b 2. c 3. a 4. b 5. a

24. Thank You for Listening!!!

25. Learning Resources: Science-Grade 10 Learners Materials, pp.93-94. Science-Grade 10 Teacher’s Guide, pp. 75-77. http:/www.worldofteaching.com http://physics.tutorvista.com/electricity-and-magnetism.html www.tutorvista.com/physics/10-uses-of-magnets?view=sample www.purplerail.com/partytrail/type-of-magnets/ https://proprofs.com/quiz-scholl/story.php?title=magnetism-quiz