Topic 12 Flashcards
What is magnetism?
the ability of magnets to attract (pull towards) and repel (push away) other magnets without touching them.
What is attraction?
Magnets have a north pole (N) and south pole (S).
If two magnets are close enough to each other, then the south pole of one magnet will attract the north pole of the other magnet.
What is repulsion ?
If one magnet is turned so that both south poles (or both north poles) are close together, then the magnets will repel each other.
Opposite poles on a magnet attract and like poles on a magnet repel. This is an example of a non-contact force
What are the properties of magnetic material ?
Magnetic materials, like iron, don’t always act as magnets.
For example a normal piece of iron won’t attract (pull) or repel (push) another piece of iron.
But magnetic materials, like iron, are attracted to a magnet if they are close enough to the magnet.
Magnetic materials can be attracted by a magnet, but can’t be repelled by a magnet.
Only two magnets can repel each other.
Non-magnetic materials will never be attracted to magnets.
Permanent magnets are always magnetic, even when they are not near other magnets.
They produce their own magnetic field.
Name the four well known metals that are magnetic materials
Nickel,steel, iron, cobalt
When a magnetic material is close to a permanent magnet what will it become ?
A magnetic material will temporarily become a magnet.
There is always an attractive force between an induced magnet (or magnetic material) and a permanent magnet
What are induced magnets ?
Induced magnets are magnetic materials that become magnets when they are in a magnetic field
When moved away from the permanent magnet, the magnetic material will stop being a magnet
^ this is called induced magnetism
What do permanent magnets induce ?
The permanent magnet induces (creates) temporary poles in the magnetic material and these align so that the magnetic material is attracted to the permanent magnet.
What type of magnetism is it when a magnetic material temporarily becomes a magnet when it’s close to a permanent magnet .
Induced magnetism
