dipole

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Related to Magnetic polarity: Magnetic reversal

dipole

 [di´pōl]
1. a molecule having separated charges of equal and opposite sign.
2. a pair of electric charges or magnetic poles separated by a short distance.

di·pole

(dī'pōl),
A pair of separated electrical charges, one or more positive and one or more negative; or a pair of separated partial charges.
Synonym(s): doublet (2)

dipole

An MRI term for a magnetic field with unique north and south magnetic poles separated by a finite distance.

di·pole

(dī'pōl)
A pair of separated electrical charges, one or more positive and one or more negative; or a pair of separated partial charges.
Synonym(s): doublet (2) .
References in periodicals archive ?
At the cycle's beginning, the magnetic polarity of the hard outer shell and softer inner core are the same.
Magnetic polarity stratigraphy and ages of Siwalik Group rocks of the Potwar Plateau, Pakistan.
Verticity was Gilbert's term for what we might call "magnetic polarity," and the magnetism of the rod was indeed "captured" from the weak magnetic field of the earth in which it was immersed.
The smaller magnetic data bits get, the more unstable they tend to be, in the sense of flipping their magnetic polarity. It's possible to reach a point where data written on a disk is quickly erased simply through the action of thermal vibration.
The operations of a computer, on the other hand, replace the presence of materials with pattern recognition, with code transactions and magnetic polarity switchings that transpire in no time and without regard to distance.
As the maglev speeds along the track, alternating electric currents that pass through each coil in the guideway walls constantly change the coil's magnetic polarity (see diagram).
However these researchers have refined the Pilgrim's Upper Siwalik subdivisions through magnetic polarity zonation.
Not like alternating current technology, current direction for DC is determined by magnetic polarity, as breaking of the connection is done with magnetic action.
Sediment cores taken from deep ocean floors can tell scientists about magnetic polarity shifts, providing a direct link between magnetic field activity and the fossil record.
If you need to space relays closely and cannot afford the cost of shields, alternating the magnetic polarity of pairs of relays will diminish, but not eliminate, magnetic effects.
So while magnetic polarity measurements give us ages within millions to hundreds of thousands of years, intensity measurements give us ages within thousands to tens of thousands of years--a minute hand on the magnetic clock.
Still under development, MRAM depends on magnetic polarity to store data, rather on electricity like DRAM chips, and stores bits in magnetic layers rather than in charges, yielding non-volatile solid-state storage with speeds comparable to SRAM.