MAGNETS(jan y8)
Magnets are objects made of magnetic materials such as iron, cobalt, nickel, steel(metal alloy) and
some manmade alloys (mixtures of two or more metals) .These substances are made of unique
atoms that contain electrons that have a (negative) electric charge and they orbit, each one, in a
different direction, that are the free electrons; but nevertheless this metals have another type of
moving electrons, these are the bound electrons, that means that all the electrons orbit in the
same direction. When they orbit they form small loops of electrical charges combining it with
positive electrical charge making a magnetic field with a strong magnetic force that other atoms
substances can’t do. That doesn’t mean that they are magnets because a magnet is an object made
of those magnetic materials not the magnetic material itself…There are three types of magnets:
permanent magnets, temporary magnets and electromagnets. We’re going to focus only on
permanent magnets and electromagnets.
Permanent magnets are magnets that remain magnetic after being used several times without
using an electrical current that means that the permanent magnet will stay magnetized much
longer than normal magnets. You can magnetize a piece of a magnetic material using a permanent
magnet but the force won´t be as strong as permanent magnet, it will be a lot weaker, that is an
example of a temporary magnet. You can make it by stroking a magnet on a piece of iron or
substances that contain it and with the end that you strike it will be the opposite. E.g.: If it is north
the part of the piece that you have stroked will be south.
Magnets have a magnetic force that is exerted by magnets. That area around the magnet were the
magnetic force is, is called magnetic field (is imaginary). Electric charges that move can form
magnetic fields. Magnetic fields are represented with magnetic field lines that are also imaginary
