Magnetic Flux

Magnetic flux is the number of magnetic field lines passing through a surface placed in a magnetic field.

magnetic flux











We show magnetic flux with the Greek letter; Ф. We find it with following formula;


Where Ф is the magnetic flux and unit of Ф is Weber (Wb) 

B is the magnetic field and unit of B is Tesla 

A is the area of the surface and unit of A is m2

Following pictures show the two different angle situation of magnetic flux.

magnetic flux images



In the first one, magnetic field lines are perpendicular to the surface, thus, since angle between normal of the surface and magnetic field lines 0 and cos0=1equation of magnetic flux becomes;


In the second picture, since the angle between the normal of the system and magnetic field lines is 90º and cos90º=0 equation of magnetic flux become;


Magnetic Permeability

In previous units we have talked about heat conductivity and electric conductivity of matters. In this unit we learn magnetic permeability that is the quantity of ability to conduct magnetic flux. We show it with µ. Magnetic permeability is the distinguishing property of the matter, every matter has specific µ. Picture given below shows the behavior of magnetic field lines in vacuum and in two different matters having different µ.

magnetic permeability




Magnetic permeability of the vacuum is denoted by;µo and has value;


We find the permeability of the matter by following formula;

µ= B / H where; H is the magnetic field strength and B is the flux density

Relative permeability is the ratio of a specific medium permeability to the permeability of vacuum.


Diamagnetic matters: If the relative permeability f the matter is a little bit lower than 1 then we say these matters are diamagnetic.

Paramagnetic matters: If the relative permeability of the matter is a little bit higher than 1 then we say these matters are paramagnetic.

Ferromagnetic matters: If the relative permeability of the matter is higher than 1 with respect to paramagnetic matters then we say these matters are ferromagnetic matters.

 Magnetism Exams and Solutions


unit of magnetic permeability
magnetic flux of paramagnetic
units of magnetic permeability of vaccuum
magnetism b a formula
magnetic permeability
find relative permeability magnetic field
paramagnetism and magnetic permeability
magnetic cheat sheet
difference between magnetic permeability and relative permeability
permeability field lines magnetic angle refraction
permeability field line angle
units for permeability physics
equation magnetic flux density B A
magnetic flux lines angle ferromagnetic
to find the permeability of magnet
magnetic flux density tutorials
magnetic permeability formula
formula for magnetism
magnetic flux + formula
magnetic flux density formula angles
vacuum conducts magnetic flux
magnetic permeability with respect to tesla
"magnetic field" distance permeability
magnetic flux permeability
magnetism permeability formula
magnetic flux equation
magnetic permeability flux density
permeability pictures
find the permeability at field strength
standard equation for magnetic permeability
magnetic flux angle
flux permeability ratio
magnetic formula current flux
magnetic permeability equation
magnetic field units cheat sheet
magnetic lines of force and permeability
relative permeability sheet
magnetic field surface permeability
current and magnetic flux equation
magnetic field strength permeability surface
magnetic field strength permeability surface normal
physics relative permeability equation
picture of magnetic flux angle
formula show relationship between magnetic and electric permeability
thermal expansion vs magnetic permeability
magnetic permeability tesla
finding relative permaeability
"flux density" "relative permeability"
magnetic permeability at phase transition