Download magnetic line of force

WEEK 3 Magnetic Forces
What are magnets?
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Magnet: a piece of metal that attracts other pieces of metal
Magnets are almost EVERYWHERE. They are made out of metal and iron.
Magnetic Poles Poles (cont.)
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Like poles repel, unlike poles attract
North poles and south poles on magnets pull toward each other, called magnetic
attraction. If the poles are the same, the two magnets will push each other away.
They won't ever touch. This is called magnetic repulsion.
North Pole vs. South Pole
North pole: the end of a magnet
where lines of force flow out
Pole
South Pole: the end of a
magnet where lines of
force flow in
Magnetic Field
● Magnetic field: space surrounding a magnet, in which
force is exerted
● Produced by motion of electrical charges
● Field will continue to exist even if magnet is removed
magnetic “field”
Magnetic Lines of Force
● A magnetic field is described by drawing the magnetic lines of force.
● The path traced by a North magnetic pole free to move under the influence
of a magnetic field is called a magnetic line of force.
● The direction of a magnetic line of force at any point gives the direction of
the magnetic force on a north pole placed at that point.
Properties of Magnetic Lines of Force
1. The magnetic lines of force start from the North Pole of a magnet and end at its South Pole.
2. The magnetic lines of force come closer near the poles of a magnet but they are widely
separated at other places.
3. The magnetic lines of force do not cross one another.
4. When a magnetic compass is placed at different points on a magnetic line of force, it aligns itself
along the tangent to the line of force
Hard part’s over! Can you…?
● Can you…name the key difference between a north and
south pole?
● Can you...name an example of an object is made out of
metal?
● Can you…define what a magnetic attraction is?
● Can you...name a property of magnetic lines of force?
● True or false: Like poles attract, unlike poles repel
Good work!