magnetic needle


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Related to magnetic needle: magnetic compass

magnetic needle

a slender magnetized rod used in certain instruments, such as the magnetic compass, for indicating the direction of a magnetic field

magnetic needle

[mag′ned·ik ′nēd·əl]
(electromagnetism)
A bar magnet or collection of bar magnets which is hung so as to show the direction of the magnetic field.
In particular, a slender bar magnet, pointed at both ends, that is pivoted or freely suspended in a magnetic compass.
References in periodicals archive ?
The summing subscript <i, j> indicates the summation of all two adjacent small magnetic needles. We see that if [s.sub.i] = [s.sub.j], the total energy is reduced by J.
And since a ship's safety might depend on its magnetic needle, it also became a flogging offense for the helmsman to be caught eating anything with garlic in it.
Eventually a magnetic needle was put on a card marked with various directions, and because the needle was free to move all around the card, it was referred to as a magnetic compass (from a French word meaning "to go around").
The Client Has Pulse Water Meters On It Have A Magnetic Needle Each Water Meter Is Improving, Calibrated And Calibrated Complete With Reed Drive And Radio Module Manufacturers Coronis According To The Type-Approval And In-Class Accuracy Of Which Are Taken From The Client.
Tenders are invited for Tin Bronz Ingots-Non Magneticis:306-1983(Fe Contnt Restricted To 0.01/% Or Less)Note: Non-Magntic Proprty Wll Be Chekd By Magnetic Needle At The Distance 1.00Mm From Subject Item.
water meters on it have a magnetic needle for radio reading them.
Shagun Gupta has also certified tattoo removing technique, using magnetic needles TR88.
This is why magnetic needles, such as those found in a compass, align themselves in the Earth's magnetic field so that we can use them to determine the cardinal directions North and South and, derived from this, East and West.