Sunday, 23 August 2015
Magnet can attract iron and its outer magnetic field is generated objects. Magnet means narrow magnetite ore products, broadly refers to the use of magnets to generate a magnetic field of an object or device. As a magnetic dipole magnet that attracts ferromagnetic materials such as iron, nickel and cobalt and other metals. Poles are judged by a thread hanging magnet, called the finger pointing to the North Pole or N-pole, pointing to the South Pole as a guide pole or S pole. (If you want to become a big magnet Earth is currently Earth's magnetic north pole is S pole, the geomagnetic South Pole is the N pole.) Magnet is different poles attract, with the exclusion pole. And refers to the Arctic polar attraction guide, guide pole and guide poles repel, repel finger Arctic and Arctic finger.
Permanent magnets and magnet divided into non-permanent magnets. Natural, also known as lodestone permanent magnet, a permanent magnet may be manufactured by hand (the strongest magnets are neodymium magnets). Only non-permanent magnets have magnetic properties under certain conditions, usually in the form of electromagnets to produce, that is, the use of electric current to strengthen its field.
Non-magnetized magnet inside the magnetic molecules (molecular magnets theory) is randomly arranged, arranged in the magnetization process after the magnetic molecules have rules. In this case, N pole and S pole magnetic molecules will be facing in the same direction so that the magnet has a magnetic and become magnets. At the same time, the presence of the opposite poles of the magnetic poles and an equal amount on the same magnet.