magnetism
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/1.jpg)
MAGNETISM
![Page 2: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/2.jpg)
LEARNING OBJECTIVES At the end of the lesson, the students
should be able to:Define a magnetState that a magnet has two polesState the properties of a magnetObserve 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
![Page 3: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/3.jpg)
DEFINE A MAGNET What is a magnet?
Have you ever seen a magnet before?
![Page 4: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/4.jpg)
DEFINE A MAGNETObserve!
![Page 5: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/5.jpg)
DEFINE A MAGNETDo you know that a magnet has
two poles?- North pole and South pole.
What is a pole?- The end of the magnet.
![Page 6: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/6.jpg)
DEFINE A MAGNETA 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.
![Page 7: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/7.jpg)
DIFFERENT KINDS OF MAGNETS
![Page 8: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/8.jpg)
DIFFERENT KINDS OF MAGNETS
BAR MAGNET
![Page 9: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/9.jpg)
EXAMPLES OF MAGNETS
HORSESHOE MAGNETS
![Page 10: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/10.jpg)
EXAMPLES OF MAGNETS
RING MAGNETS A ROD MAGNET
![Page 11: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/11.jpg)
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.
![Page 12: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/12.jpg)
PROPERTIES OF A MAGNET
Properties Of a Magnet.flv
Watch this video…
![Page 13: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/13.jpg)
PROPERTIES OF A MAGNET Attractive property
A magnet attracts magnetic substances like iron, steel, nickel and cobalt.
Directive 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.
![Page 14: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/14.jpg)
LAWS OF MAGNETISM
Law Of Magnetism.flv
Pay attention…And listen what the man has to say…
![Page 15: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/15.jpg)
LAWS OF MAGNETISM
Like poles repel each other.
Unlike poles attract each other.
![Page 16: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/16.jpg)
MAGNETIC FIELDS
What is the magnetic field_.flv
Observe this video and take note of the lines of forces.
Reminder:
The lines of the magnetic field is called the lines of forces.
![Page 17: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/17.jpg)
APPLICATIONS OF MAGNETSActivity
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.
![Page 18: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/18.jpg)
APPLICATIONS OF MAGNETSHousehold applications & Entertainment
Refrigerator magnets Magnets in loudspeakers
![Page 19: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/19.jpg)
APPLICATIONS OF MAGNETSTransportation
Maglev trains Car alternator
![Page 20: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/20.jpg)
APPLICATIONS OF MAGNETSMedicinal purposes – MRI (Magnetic Resonance
Imaging)
![Page 21: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/21.jpg)
APPLICATIONS OF MAGNETSOthers
Door Stopper Electric motor
![Page 22: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/22.jpg)
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
![Page 23: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/23.jpg)
SUMMARY OF THE LESSON
Laws of magnetism states that:-Like poles repel each otherUnlike poles attract each other
![Page 24: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/24.jpg)
LEARNING OBJECTIVES At the end of the lesson, the students
should be able to:Define a magnetState that a magnet has two polesState the properties of a magnetObserve the magnetic field pattern
Around a magnet Between two like poles arranged end to end Between two unlike poles arranged end to end
![Page 25: Magnetism](https://reader036.vdocuments.us/reader036/viewer/2022070500/568168ac550346895ddf5b39/html5/thumbnails/25.jpg)
THE END