Download What is magnetism?

Done By: 7-B3
•Learn about magnetism.
•Know other ways on
using magnets.
• Magnetism is the force of attraction
between magnets and magnetic
objects.
• Every magnet has two poles (North and
South)
• Every magnet has a magnetic field around
it.
• The magnetic field is lines of force running from
the north-seeking pole to the south-seeking pole
of the magnet
• If you answered The Earth you were right!
• The Earth is one giant magnet. It has two
magnetic poles and is surrounded by a magnetic
field.
• This magnetic field is what causes the needle of a
compass to point in different directions and
causes the poles of a magnet to point either north
or south.
• Yes!
• The north and south seeking poles of two magnets attract
each other- magnetic force pulls them together.
• But if you try to bring two of the same poles (two norths
or two souths) together they will repel each other.
• Magnets are used to generate, or produce, electricity.
• Spinning a coil of wire inside a magnetic field produces an
electric force between the ends of the coil.
• In a similar way, an electric current produces a magnetic
field around it.
• A temporary magnet made by passing electric
current through a wire coiled around an iron bar.
• A junkyard is one place to see an electromagnet
in action. A crane holding a huge electromagnet
can be used to pick up scrap metal when current
flows through it. When the crane operator wants
to drop the scrap, he or she will simply shut off
the current to the electromagnet.
• No, if your thinking magnetism can only be
applied in science, well your wrong :P
• In Geography, magnetism takes a great part in our
earth, our planet is a giant magnet because its
core is mostly iron and nickel. North Pole and
South Pole are the end of this magnet.
• In Math, there are a lot of math equations
regarding magnetism, that helps us create gadgets
using magnets.
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1. North poles point north, south poles point south.
2. Like poles repel, unlike poles attract.
3. Magnetic forces attract only magnetic materials.
4. Magnetic forces act at a distance.
5. While magnetized, temporary magnets act like
permanent magnets.
• 6. A coil of wire with an electric current
flowing through it becomes a magnet.
• 7. Putting iron inside a current-carrying coil
increases the strength of the electromagnet.
• 8. A changing magnetic field induces an electric
current in a conductor.
• 9. A charged particle experiences no magnetic
force when moving parallel to a magnetic field,
but when it is moving perpendicular to the
field it experiences a force perpendicular to
both the field and the direction of motion.
• 10. A current-carrying wire in a perpendicular magnetic
field experiences a force in a direction perpendicular to
both the wire and the field
• A YouTube Video Explaining Magnetism further
•
Click Here to Watch ~
John Alvin
Hassan Samir
Moheb
And Other who I may
have forgotten to put
here…..