0
0
0

magnets

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets. A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism. Ferromagnetic materials can be divided into magnetically "soft" materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically "hard" materials, which do. Permanent magnets are made from "hard" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a strong magnetic field during manufacture to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material.
Fridge magnets - Fridge magnets, from different countries, different views
Play now!
Fridge magnets

Added year ago by aneta

31

Fridge magnets - Fridge magnets, photo
Play now!
Fridge magnets

Added year ago by aneta

12

Fridge magnets - Fridge magnets, various shapes, landscapes, views
Play now!
Fridge magnets

Added year ago by aneta

12

Fridge magnets - Fridge magnets
Play now!
Fridge magnets

Added year ago by aneta

11

Fridge magnets - Fridge magnets, lots of colorful magnets from around the world, from different cities, countries
Play now!
Fridge magnets

Added year ago by aneta

17

Fridge magnets - Fridge magnets, different cities, different countries
Play now!
Fridge magnets

Added year ago by aneta

7

Fridge magnets - Fridge magnets, colorful, from different places
Play now!
Fridge magnets

Added year ago by aneta

24

Fridge magnets - Fridge magnets, different shapes, from around the world
Play now!
Fridge magnets

Added year ago by aneta

13

Fridge magnets - Magnets on the refrigerator from around the world
Play now!
Fridge magnets

Added year ago by aneta

11

Fridge magnets - Fridge magnets
Play now!
Fridge magnets

Added year ago by aneta

16