Magnets are very fascinating and interesting elements. They have been
used for so many functions as well as for having fun. Toying around
with magnets can provide entertainment for children and adults alike.
Playing with their incredible capabilities makes one at awe it’s like
magic how they cling to metal and other magnets as well. Man has been
engrossed with their magnetic capabilities that they soon discovered
how to synthesize these capabilities bringing forth the electromagnet.
By simply coiling wires around into a loop, electric current is passed
through these coils and a magnetic field is created. This can be very
useful when natural magnets or permanent magnets are not available or
too costly. Permanent magnets are those that don’t need outside
influences to have a magnetic field.
Magnets are any object, be it a permanent magnet or an electromagnet,
which has a magnetic field. Magnets are attracted or repelled by other
objects. When that object can attract or repel a magnet it is said that
such objects have high permeability, iron and steel are examples of
those. All types of magnets have two poles, termed bipoles they are
the South Pole and the North Pole. Even if a magnet is reduced to a
molecular size there would still be the two opposing poles.
Similar poles would repel one another while dissimilar poles would
attract each other and make them stick together.
Magnets have been very useful and have been utilized in many everyday
objects. Many of what we enjoy today uses magnets in one way or
another. For instance, magnets are converted into magnetic strips where
in information can be stored. In the case of video tapes and audio
tapes, the sound and images are stored on the magnetic coating of the
tape. Placing these tapes near a strong magnet will destroy the data
encoded inside it. ATM, credit and debit cards also employ a strip of
magnetic field on its backside. This magnetic strip contains all the
information needed to access their accounts and financial institutions
that’s concerned with the card.
Microphones and speakers also need magnets to make them work. They
utilize a combination of permanent magnet and an electromagnet.
Speakers use the electromagnet to carry the signals that generate a
varying magnetic field that influences the motion of the magnetic
fields that is generated by the permanent magnet. This recurring force
moves the cone which produces the sound. The microphone has the same
concept but is done in a reverse manner. Common television sets and
computer monitors also use magnets to generate images. Generators and
electric motors also need magnets for proper operation. Transformers
also use them. Then there are the other uses for magnets that can be
quite fun and amusing, such as the refrigerator magnets.
Magnets though can be stripped off of their magnetic capabilities. For
an electromagnet it is very easy, you only need to deprive it of its
flow of current and the magnetic field will die down. For permanent
magnets there are a couple of ways to demagnetize it. Rubbing one
magnet to another in a random manner will do the job some materials
though cannot be demagnetized because they have a high coercive field.
Intense heat also influences the magnetic attributes of a permanent
magnet.
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» left by Lailani from Paris, France (1 year 267 days ago.)
OMG!!!!! U r a genious. I would have failed 2nd semester science if it wasn't for u! Keep rockin'
» left by ztevie from uk (1 year 216 days ago.)
cheers a lot lol this is good cos its jus one of those things that usually you could never find. it was real usefull tyvm =) Respond to this comment
» left by Bree from wa (1 year 211 days ago.)
You told every thing i needed to know.
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