Points
to remember
* Magnetites are
natural magnets. They are called magnetic stones.
* Man-made magnets
are called artificial magnets.
* Substances which
are attracted by magnet are called as magnetic substances.
* Substances which
are not attracted by magnet are called non-magnetic substances.
* A freely
suspended magnet always comes to rest in north-south direction.
* The end of the
magnet that points to the north is called the North Pole. The end that points
to the south is called the South Pole.
* A compass is an
instrument which is used to find directions.
* Like Poles (N-N,
S-S) repel each other and unlike poles (N-S, S-N) attract each other.
* Magnets lose
their properties if they are heated or dropped from a height or hit with a
hammer.
ICT Corner
Magnet
Through
this activity you' be able to understand the properties of magnetic poles and
magnetic field lines.
Step 1: Type the URL given or scan the QR code to
launch the activity page.
Step 2: A diagram of a bar magnet and a magnetic needle
are there. Click and drag the magnetic needle with the use of mouse, around the
bar magnet. Observe the position of the magnetic field lines and how the needle
rotates according the poles.
Step 3: Click the 'Next navigation icon'. A grid of
magnetic needles around a bar magnet will appear. Click and drag the bar
magnet. Observe the changes of the needles.
Step 4: Click the 'field lines' check box at the bottom of the activity window
to see
the magnetic field lines.
Magnet URL:
http://www.physics-chemistry-interactive-flash-animation.com/
electricity_electromagnetism_interactive/bar_magnet_magnetic_ field_lines.htm
*Pictures are
indicative only
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