MAGNETIC FIELD

Magnetic field:

                                     The field around the magnetic in which it can attract or repel easily any magnetic material called magnetic field .

                                                                                                                                                           

magneto motive force (magnetic potential)    

where Φ is the magnetic flux and R is the reluctance of the circuit. It can be seen that the magneto motive force plays a role in this equation analogous to the voltage V in Ohm's law: V = IR, since it is the cause of magnetic flux in a magnetic circuit

Units:

Units:

MAGNETIC POLE'S:

                                      In magnetic there are two poles one is north In SI units, B is measured in teslas (symbol: T) and correspondingly ΦB (magnetic flux) is measured in webers (symbol: Wb) so that a flux density of 1 Wb/m2 is 1 tesla. The SI unit of tesla is equivalent to (newton·second)/(coulomb·metre).[nb 6] In Gaussian-cgs units, B is measured in gauss (symbol: G). (The conversion is 1 T = 10,000 G.) One nanotesla is also called a gamma (symbol: γ). The H-field is measured in amperes per metre (A/m) in SI units, and in oersteds (Oe) in cgs unitand other is south they remain always together they can not apart from one an other .They can not exist independently while charges can exist + and - independently easily.

Direction of magnetic field:                                                                                                             THIS FIG DESCRIBE THE DIRECTION OF MAGNETIC FIELD IN ELECTRIC WIRE.