Sunday, April 7, 2013

MAGNETIC FIELD


Magnetic phenomena known by the Chinese in 2000 BC . In nature, other than the gravitational force and interaction type of electrical interference , BC Manipur is today about the fourth century BC by people living in that period Magnesia as a form of iron ore particles has been observed in other iron shrinkage . History According to popular belief , at that time a shepherd pasturing his sheep in the mountains of Manisa , where some of the stones had been taken by the tip of his staff noticed ferrous etmiştir.Bu izafen type interaction where the incident occurred , so the magnet is called the magnetic interaction and iron Ore . Pulling, and pushing the magnet poles of a magnet is called feature is more pronounced in some parts . BC ' the centuries, the magnet is brought near to an iron rod and the rod with a natural magnet feature time hanging around a vertical axis , and not nearly as self- direction in which the north and south , was known by the Chinese . According to what we know as the use of the compass magnet using this feature before the eleventh century .


Another natural earth itself is a big magnet . Earth , stone rubbing a magnet mıknatısılanan a freely rotatable in a horizontal plane and an iron needle , the earth's north - south direction and its seamanship 12 yönelltiği Used as a compass correctly said that a hundred years .



The relationship between the magnetic phenomena elktriksel events , in l8l9 HC By Oersted , due to deviation of the compass next to a wire with current , as shown in experimental . Magnetic interactions forces between electric charges moving charges in edilmektedir.Hareket considered to occur at each other outside electrical forces Coulomb's law states , apply the magnet forces . For him the subject of magnetism , will continue with the study of forces between moving charges and magnetic properties of matter will be examined in the future .

Examining the magnetic field , rather than dealing directly applied force diğerince moving a load on a moving charge creates a magnetic field in space , and the area where his other act, a motion to accept the load is more appropriate .

Electrostatic force and the gravitational force is not a point of önemsenemiyeceği space , moving a load force act, at this point, there is a magnetic field, the magnetic forces acting on the next denir.Hareketli loads , live loads , and even though a lot of the electric field generated by the currents are thus küçüktürki okadar negligible .


The electric field lines of force is known for how the gravitational field , the magnetic field is defined by the field lines . The magnetic field B is a vector quantity. To B is the magnetic flux density or magnetic induction Adida . The electric field around the electric charge of an object , such as a magnet or a current passing through a wire creates a magnetic field around . An electric field and a magnetic field very far apart , although naturally there are many similarities between them . A magnetic field as an electric field at each point of a vector having a certain magnitude and direction kemiyettir . A magnetic field as an electric field , the directions of the direction of B at each point , indicated by magnetic field lines , and these lines are often sparse areas where there is a large force of B is small. Thus , the total number of these lines with their directions of the regular surface unit is called a magnetic field flux . Magnetic flux , the electric field vector in a similar manner


                                         Φ=∫B.ds


or in its severity

                                     
                                         Φ=∫cos(x)BdS

x B 's , and the angle of the surface normal unit of magnetic field strength in SI units

l Tesla = l N / Amp. m = l Weber / m2 is .

 
Gauss magnetic field, which is the old currency used in some cases . The relationship between Tesla and Gauss
l Tesla = l 04 Gauss ( G ) form. 2.5 T magnetic field, the value of which can be obtained in laboratories is the greatest . However 25T ( 250,000 G ) , reaching the size of superconducting magnets made ​​of magnetic field can produce . In regions close to the surface of the earth magnetic field value of approximately 0.50 T or G 0,5.10-4 stop.


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