Μαγνητική ροή: Διαφορά μεταξύ των αναθεωρήσεων

The [[flux]] through an element of [[area]] [[perpendicular]] to the direction of magnetic field is given by the product of the [[magnetic field density]] and the [[area]] element. More generally, magnetic flux is defined by a [[scalar product]] of the magnetic field density and the area element vector. Gauss's law for magnetism, which is one of the four [[Maxwell's equations]], states that the total magnetic flux through a closed surface is zero. This law is a consequence of the empirical observation that [[magnetic monopole]]s do not exist or are not measurable.

:'''B''' is the magnetic field density

The direction of the magnetic-flux-density field vector <math>\mathbf{B}</math> is by definition from the south to the north pole of a magnet (within the magnet). Outside of the magnet, the field lines will go from north to south.