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 مشروع التجربة العلمية للغة الإنجليزية

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Introduction:Explore the ancient human species distinct from the black stone is different from other known types of stones, as it was these stones that could attract small pieces of iron. And make some tools, such as magnetized screwdriver, if a small screw fell in a small space inside a computer, for example, do not get to hand easily, it is in the ability of art captured easily by using the magnetic screwdriver. perhaps the most surprising and surprised on the subject of magnitism is that we live
On the surface of a gaint magnet, the globe have magnatician completly normal one magnet is located in the south,north of geografical land and another is located in the south and north of the geografical land.
The story of the magnet:قصة المغناطيسMythology tells that a shepherd named Magnes was tending his sheep, he noted that the party stick made of ferrous material attracted to certain stones, these stones became known as the "magnetic stones" attributed to him after he discovered this phenomenon. And may be that the label for a boycott of Magnesia (Magnesia) in Asia Minor, near Turkey, where I discovered these stones magnetic for the first time, the Greeks called it the stone the name of the stone is strange, stone, metal and later named as stone, magnetic as was the name of the magnet on the penis is made of material that can be gained magnetic properties of stone.
Natural magnet: المغناطيس الطبيعيIt is a metal extracted from the magnetic stone and this type does not have the form of specific type or severity, was used by ancient people to make a compass. There is no longer practical importance of the magnetic stone these days are used instead magnetic materials, industrial producer of iron alloys or special give powerful magnets.
Industrial magnet: المغناطيس الاصطناعيOver time a person could make magnets in different forms, the mismatch is in the form of horse shoes, and some are in the form of a flat rod, including the cylindrical shape. There are also magnets in the form of workshops, and the other in the form of a letter U.
It has been possible to take advantage of them in the manufacture of the compass as an application on the direction of the north pole of magnet is always about the geographical North Pole of the Earth, when commenting the free magnet is also used in generators and electric motors, speakers, phones and other ... .
General properties of the magnet: الخصائص العامة للمغناطيس1 - If a magnet suspended from the middle when its center of gravity, so that free movement in the horizontal plane, it moves first to be a dwelling so that one is heading towards the north magnetic poles and other pole to the south magnetic axis of the magnet and be applicable to the magnetic meridian of the Earth.
When the magnet attached horizontally comment is free, it tends to settle down by itself at both ends towards the north is always, therefore, called a researcher from the north pole, which we call a shortcut to the North Pole, also called a pole located at the other pole is a southerner.
2 - magnet has two poles, one north and one south, and no matter how the magnet of the palace it has always been bipolar, and writes occasionally on magnet letter N on a terminal, and the letter S on the other side, this means that the first party is the North Pole while the other is the South Pole . And sometimes dying Arctic red dye, while the Antarctic blue.
3 - increase the power of attracting magnet material magnetic at two points next to the terminal, and called each pole of a magnet, and when immersion magnet in the center of iron filings note that the refrigerator clustered at both ends of the magnet, while gathering the amount is very little in the middle, called the middle area between the poles of a magnet neutral zone or region is subsiding.
4 - different magnetic poles attract each other and similar magnetic poles repel each other.
5 - the staple food magnet poles of one are equal.
6 - magnet attracts certain materials, called magnetic materials.
7 - the ability of the magnet to attract different things, as the magnet attracts iron wrought more strongly the power of attracting iron steel and nickel.
8 - strength of the magnet is carried out via non-magnetic materials not be carried out through the magnetic materials.
9 - lose magnet Magntth extreme methods and heating as well as heat and
electricity.

Observed behavior between magnetic poles similar to what happens between the electrical charge similar and different, but there is a fundamental difference between the magnetic poles and electric charges, as can be separated electric charges negative for electrical charges of positive as can be produced shipments electric single negative or positive, while there can be no pole single magnetic (north pole or south pole single) Any attempt to cut the magnet in half or more magnets produce smaller and Baktabin two north and south.
When the magnet is cut in half to get Magnatisin their respective poles, and can not be this way or other to separate the North Pole to the South Pole magnet for him.
Which can not be separated one from the other poles of a magnet important we continue to cut magnets, each magnet no matter how small the dipole.
Our vehicle only to study the effect of the magnetic poles to each other is to use the magnets long, and can thus neglect the impact of long poles.
Basic Law in Magnetism: القانون الأساسي في المغناطيسيةWhen you bring poles of a magnet are similar to each other, the repulsion force affecting both of them and make them diverge from each other, while at the poles of a magnet bringing different from each other, they attracts. So:
Similar magnetic poles repel each other, and different magnetic poles attract each other.
Experience: Acquisition of iron objects of the magnetization
Tools used: magnetic rod, paper clips.
Méthode: put the magnet close to the paper clips one after the other and then raise the bar towards the top magnetic.
Note: We note some affinity clamps linked by the magnets and at a series and when you raise the magnet towards the top want to get with the string formed from paper clips.
Explanation: This string is formed consisting of paper clips under the influence of the magnetic field.
Conclusion of the experiment: Affinity of the penis paper clips magnetic evidence of the acquisition of magnetization.
Conclusion: Natural magnet is a magnetic stone has no form of specific type or severity.
Industrial magnet is made from steel or from an alloy of iron, a first in the form required and then magnetize one of the methods of magnetization and is characterized by industrial magnet for each magnet no matter how small electrodes Magnatician one north and one south, and at the suspension of the magnet from the middle of a comment freely, it settles to the north and south Amonatisiein.
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