The strength of a magnetic field. Also called MAGNETIC INTENSITY.



Related Terms

ELECTROMAGNETIC INDUCTION

The production of electromotive force (EMF) in a conductor through relative motion of a conductor and a magnetic field, or by the change in the strength of magnetic flux around the conductor.

VERTICAL INTENSITY OF THE EARTH’S MAGNETIC FIELD

The strength of the vertical component of the earth’s magnetic field.

COTTON BALANCE

A device which employs a current-carrying conductor of special shape to determine the strength of a magnetic field.

MAGNETIC POLE

  1. Either of the two places on the surface of the earth where the magnetic dip is 90°, that in the Northern Hemisphere being designated north magnetic pole, and that in the Southern Hemisphere being designated south magnetic pole. Also called MAGNETIC DIP POLE. See also MAGNETIC LATITUDE, GEOMAGNETIC POLE, MAGNETIC LATITUDE. 2. Either of those two points of a magnet where the magnetic force is greatest.

MAGNETIC FIELD

The region within which a body or current experiences magnetic force.

MAGNETIC MOMENT

The quantity obtained by multiplying the distance between two magnetic poles by the average strength of the poles.

ELASTIC HYSTERESIS

Phenomenon exhibited by some solids in which the deformation of the solid depends not only on the stress applied to the solid but also on the previous history of this stress; analogous to magnetic hysteresis, with magnetic field strength and magnetic induction replaced by stress and strain respectively.

DEGAUSSING

Neutralization of the strength of the magnetic field of a vessel, using electric coils permanently installed in the vessel.

SHIELDING FACTOR

The ratio of the strength of the magnetic field at a compass to the strength if there were no disturbing material nearby; usually expressed as a decimal. Because of the metal of a vessel, the strength of the earth’s magnetic field is reduced somewhat at a compass location aboard ship. The shielding factor is one minus the percentage of reduction.

FLUX

A material used to prevent, dissolve, or facilitate removal of oxides and other undesirable surface substances. Also, the measure of the quantity of magnetism, taking into account the strength and extent of the magnetic field.

Functions Of Fluxes

Continuity of grain structure across a soldered or welded joint can only be obtained if the metals are brought into atomic contact, and this is not possible if the metals are coated with oxide layers, grease, corrosion products or other surface films. Mechanical cleaning can only remove the bulk of such surface films, some form of chemical cleaning being necessary to complete the cleaning operation. Fluxes perform some or all of the following functions:

They chemically clean the surfaces to be joined,

They prevent the formation of new oxide layers during the heating cycle of the joining process,

They assist the filler metal to run freely into the joint, and

They assist the "wetting" process by which surfaces alloying occurs.

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