Simple phenomena of magnetism Flashcards
Ferromagnetic
materials like iron can be made into magnets.
Magnetic materials
are naturally attracted to magnets even when not magnetized.
Poles
always come in pairs: north and south.
similar poles=
repel each other (N - N and S - S)
Every magnet has a
North Pole (N) and a South Pole (S).
Magnetic poles
attract magnetic materials and are found near the ends of magnets.
The North Pole of a magnet points
towards the Earth’s geographic North Pole.
Induced Magnetism
Magnetic materials can become magnetized when near a magnet.
Opposite poles
Attract eachother (S -N)
Removing an iron chain by pulling the top nail
causes it to collapse because iron shows temporary magnetism.
Iron nails and steel paper clips
can be magnetised by hanging them from a magnet.
Each nail or clip magnetises the next in a chain
with unlike poles attracting each other.
Soft materials
(e.g. iron) are easily magnetised but lose magnetism quickly.
Hard materials
(e.g. steel) are harder to magnetise but remain magnetised longer.
Steel chains do not collapse
when removed because they have permanent magnetism.
