Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
MAGNETISM LEARNING OBJECTIVES At the end of the lesson, the students should be able to: Define a magnet State that a magnet has two poles State the properties of a magnet Observe the magnetic field pattern Around a magnet Between two like poles arranged end to end Between two unlike poles arranged end to end State and describe some applications of magnets in their everyday life DEFINE A MAGNET What is a magnet? Have you ever magnet before? seen a DEFINE A MAGNET Observe! DEFINE A MAGNET Do you know that a magnet has two poles? - North pole and South pole. What is a pole? - The end of the magnet. DEFINE A MAGNET A magnet is a solid which attracts magnetic materials or objects and points north-south direction when suspended. A magnet is a material that produces a magnetic field. A magnet is a piece of material that attracts metal. DIFFERENT KINDS OF MAGNETS DIFFERENT KINDS OF MAGNETS BAR MAGNET EXAMPLES OF MAGNETS HORSESHOE MAGNETS EXAMPLES OF MAGNETS RING MAGNETS A ROD MAGNET PROPERTIES OF A MAGNET A magnet exerts a magnetic force. When a bar magnet is freely suspended, the bar magnet points to north-south direction. PROPERTIES OF A MAGNET Watch this video… PROPERTIES OF A MAGNET Attractive A magnet attracts magnetic substances like iron, steel, nickel and cobalt. Directive property property A freely suspended magnets always point to the north-south direction. Poles exist in pairs A magnet contains two poles i.e. North pole and South pole Magnetic property is maximum at its poles. LAWS OF MAGNETISM Pay attention… And listen what the man has to say… LAWS OF MAGNETISM Like poles repel each other. Unlike other. poles attract each MAGNETIC FIELDS Observe this video and take note of the lines of forces. Reminder: The lines of the magnetic field is called the lines of forces. APPLICATIONS OF MAGNETS Activity In groups of four or five, give a list of uses of magnets in your everyday life. You are given 3 minutes for discussion. Then choose a leader from your group to state one use of the magnet and explain its importance to your everyday life. APPLICATIONS OF MAGNETS Household applications & Entertainment Refrigerator magnets Magnets in loudspeakers APPLICATIONS OF MAGNETS Transportation Maglev trains Car alternator APPLICATIONS OF MAGNETS Medicinal purposes – MRI (Magnetic Resonance Imaging) APPLICATIONS OF MAGNETS Others Door Stopper Electric motor SUMMARY OF THE LESSON A magnet is a solid which attracts magnetic materials or objects and points north-south direction when suspended. A magnet has two poles – North pole & South pole. The properties of a magnet are Attractive property Directive property Poles exist in pairs SUMMARY OF THE LESSON Laws of magnetism states that: Like poles repel each other Unlike poles attract each other LEARNING OBJECTIVES At the end of the lesson, the students should be able to: Define a magnet State that a magnet has two poles State the properties of a magnet Observe the magnetic field pattern Around a magnet Between two like poles arranged end to end Between two unlike poles arranged end to end THE END