2015年8月18日星期二

permanent magnet


A magnet capable of generating a magnetic field, a ferromagnetic substance having interesting such as iron, nickel, cobalt and other metal features.
The midpoint of the bar magnet suspended by a thin line, when stationary, its ends will each point to the Global South and the North, called the finger pointing towards the north end of the North Pole or N-pole, pointing to the south end of the guide pole or S pole.
If the thought of a big magnet Earth, neodymium cylinder magnet the Earth's magnetic north pole is a guide, it refers to the geomagnetic North Pole South Pole. Between the magnet and the magnet, repelling poles of the same name, synonym of magnetic pole attracting. So, compass and Antarctic repulsion, compass and Arctic repulsion, and the compass and compass with attractive.
Category: magnets can be divided into "permanent magnet" and "non-permanent magnets." The permanent magnet may be a natural product, also known as natural magnet to be manufactured by the human user. Non-permanent magnets, such as magnet, only under certain conditions to appear magnetic.

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