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A refrigerator magnet or fridge magnet is a small magnet, often attached to an artistic or whimsical ornament, which may be used to post items such as shopping lists, Christmas cards, child art or reminders on a refrigerator door, or which simply serves as decoration. [1] [2] [3] Refrigerator magnets come in a wide variety of shapes and sizes ...
A man "steals" a gift in a white elephant gift exchange, while its previous owner is reluctant to relinquish it. A white elephant gift exchange, [1] Yankee swap [2] or Dirty Santa [3] [nb 1] is a party game where amusing and impractical gifts are exchanged during festivities. The goal of a white elephant gift exchange is to entertain party ...
The heliospheric current sheet, or interplanetary current sheet, is a surface separating regions of the heliosphere where the interplanetary magnetic field points toward and away from the Sun. [1] A small electrical current with a current density of about 10 −10 A /m 2 flows within this surface, forming a current sheet confined to this surface.
A pinched aluminium can, produced from a pulsed magnetic field created by rapidly discharging 2 kilojoules from a high-voltage capacitor bank into a 3-turn coil of heavy gauge wire. Electromagnetic forming ( EM forming or magneforming) is a type of high-velocity, cold forming process for electrically conductive metals, most commonly copper and ...
A horseshoe magnet is either a permanent magnet or an electromagnet made in the shape of a horseshoe (in other words, in a U-shape). The permanent kind has become the most widely recognized symbol for magnets. [1] : 2 It is usually depicted as red and marked with 'North' and 'South' poles. [1] : 3 Although rendered obsolete in the 1950s by ...
Magnetic viewing film showing magnetic poles of a refrigerator magnet. The poles are dark, and pole edges are bright. Magnetic field viewing film is used to show stationary or (less often) slowly changing magnetic fields; it shows their location and direction. It is a translucent thin flexible sheet, coated with micro-capsules containing nickel ...
Electrodynamic suspension. Electrodynamic suspension ( EDS) is a form of magnetic levitation in which there are conductors which are exposed to time-varying magnetic fields. This induces eddy currents in the conductors that creates a repulsive magnetic field which holds the two objects apart. These time varying magnetic fields can be caused by ...
A superconducting magnet is an electromagnet made from coils of superconducting wire. They must be cooled to cryogenic temperatures during operation. In its superconducting state the wire has no electrical resistance and therefore can conduct much larger electric currents than ordinary wire, creating intense magnetic fields.
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