magnetic flux

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Related to magnetic flux: magnetic flux density, Magnetic field density

flux, magnetic,

in physics, term used to describe the total amount of magnetic fieldfield,
in physics, region throughout which a force may be exerted; examples are the gravitational, electric, and magnetic fields that surround, respectively, masses, electric charges, and magnets. The field concept was developed by M.
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 in a given region. The term flux was chosen because the power of a magnet seems to "flow" out of the magnet at one pole and return at the other pole in a circulating pattern, as suggested by the patterns formed by iron filings sprinkled on a paper placed over a magnet or a conductor carrying an electric current. These patterns are called lines of induction. Although there is no actual physical flow, the lines of induction suggest the correct mathematical description of magnetism in terms of a field of force. The lines of induction originate on the north pole of the magnet and end on the south pole; their direction at any point is the direction of the magnetic field, and their density (the number of lines passing through a unit area) gives the strength of the field. Near the poles where the lines converge, the field and the force it produces are large; away from the poles where the lines diverge, the field and force are progressively weaker.

Magnetic Flux


the flux Φ of the vector of magnetic induction B through a surface. The magnetic flux through a small area dS within which the vector B can be considered constant is expressed by the product of the area and the projection Bn of the vector onto the normal to the area, that is, by dΦ = BndS. The magnetic flux Φ through a finite surface S is defined by the integral

Ф = S Bn dS

For a closed surface, this integral is equal to zero, reflecting the solenoidal character of a magnetic field, that is, the absence in nature of magnetic charges—the sources of a magnetic field. The unit of magnetic flux in the International System of Units is the weber, and in the cgs system, the maxwell (1 weber = 108 maxwells).

magnetic flux

[mag′ned·ik ′fləks]
The integral over a specified surface of the component of magnetic induction perpendicular to the surface.
References in periodicals archive ?
The aim of the procedure was to provide the peak magnetic flux density in the water that is required for efficient AMT (taken from Table I), and the homogeneity of the field along the cross-section of the pipe in the middle of the magnetic unit.
This negative voltage will inhibit the original current that created the magnetic flux, effectively providing impedance to the original current flow.
The [not member of]-EV with toroidal magnetic flux [PHI], is a substantial part of the description of a quark.
A linear model of the PM synchronous generator for analysis of magnetic flux distribution in the non-magnetic gap between ferromagnetic cores of the armature and inductor has been created for this study (Fig.
cm] permit one to obtain a magnetic flux density near the wall of about 1 T and to create a field gradient of about 2 T/cm.
One problem with this method is that only the cracks that lie in a direction transverse to the lines of magnetic flux will be detected.
Even the latest, high-resolution variations of magnetic flux and ultrasound in-line tools have their drawbacks.
Magnetic flux concentrators are used at key points to increase power in more massive areas.
The drive uses AME technology where the magnetic layers are made of 100% cobalt material, a recording surface with twice the magnetic flux density of coated media, offering improved levels of recording density and recording system performance.
It has a magnetic flux density of 3 tesla and simplex and continuous large helical coils.
Finally, in a dosimetric survey, a gaussmeter, which is used to measure the resultant magnetic flux density emanating from electric power sources in milligauss (mG), is placed at a fixed location or attached to a test subject.