Magnetism Flashcards
A current carrying wire has
A magnetic field around it while current is flowing
All magnets have
A magnetic field
electromagnets are ones that
We can control (turn on and off)
Magnets can attract objects made from
Magnetic materials
Ie iron steel cobalt nickel graphite
Magnets cannot attract non magnetic materials
Ie plastic wood paper rubber
Strongest parts of a magnet are called
Poles
Most magnets have … Poles
Two
Poles are called
North and south
Similar poles ..
repel
Opposite poles …
Attract
What does a magnetically hard material do
Is a permanent magnet, that retains its magnetism once it has been magnetised ie steel
Magnetically soft materials…
Are not permanent magnets, they lose their magnetism easily therefore useful as temporary magnets ie iron
Magnetism can be induced how
By leaving a magnetic material in a magnetic field
What is a magnetic field
A volume of space where magnetism can be detected
Magnetic fields are invisible so we use
Iron filings or plotting compasses to outline the shape and discover strength and direction of it
