Download Magnet - ICT In Science

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