 |
Magnets
by Charles Linrette
http://www.flmagnet.com
A magnet is any material that has a magnetic field. Magnets
can be permanent magnets or electromagnets. Permanent
magnets do not rely on outside influences to generate their
field while electromagnets rely upon electric current to
generate a magnetic field.
Most objects containing metal or iron are attracted to
magnets because these materials have some kind of
permeability in them. Even magnets are attracted to each
other on one side, turn them over though and they repel
each other. Water is not attracted to magnets because it
has no permeability to it. To measure a magnets strength
it's measured by a unit called a Telsa, named after an
electrical engineer Nikola Tesla, who spent his time
working with magnets.
Magnets can be attracted to each other on one side and will
repel each other on the other side. Many objects can be
magnetized but some things should not even come within the
magnetized field of a magnet because it can cause serious
damage. Wrist watches to not do well around magnets as well
as some types of tape recordings can be erased permanently
if brought within range of a strong magnet.
Magnets can transform their energy to another object
without loosing any of its own power. Loudspeakers get
their energy from a combination of permanent magnet and an
electromagnet. Speakers convert their energy into
mechanical energy; some electric motors also rely on a
blend of magnets. Generators too use magnets but they work
in the opposite direction than magnets converting their
mechanical energy into electric energy.
We rely on the use of magnets and don't even know it
because they usually can't be seen. Credit and bank cards,
a drivers license or any other kind of card you have to
swipe to use has that magnet strip on the back of the card.
This strip contains all the information one needs to know
about you is encoded in that strip of magnetic tape on the
back. VHS tapes contain magnetic energy inside the tape
which hold the information of voice and sound within the
VHS tape. Many of our high-tech components of today like
televisions and computer monitors use some kind of magnetic
information inside of it that makes is work the way it
should. Magnets are an essential part of our daily lives
and not just to hold your child's artwork on the front of
your refrigerator.
Submit An Article
|
|  |
