m agnetism. l earning o bjectives at the end of the lesson, the students should be able to: define a...
TRANSCRIPT
MAGNETISM
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
DEFINE A MAGNET What is a magnet?
Have you ever seen a magnet before?
DEFINE A MAGNETObserve!
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 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.
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
Properties Of a Magnet.flv
Watch this video…
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.
LAWS OF MAGNETISM
Law Of Magnetism.flv
Pay attention…And listen what the man has to say…
LAWS OF MAGNETISM
Like poles repel each other.
Unlike poles attract each other.
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.
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 MAGNETSHousehold applications & Entertainment
Refrigerator magnets Magnets in loudspeakers
APPLICATIONS OF MAGNETS
Transportation
Maglev trains Car alternator
APPLICATIONS OF MAGNETSMedicinal 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 otherUnlike poles attract each other
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
THE END