1, the metal is attracted to the magnet is one of the few, only several ferromagnetic metals such as iron, nickel, cobalt, etc, the vast majority of other metals such as gold, silver, copper, aluminum, tin, lead, titanium, etc are not attracted to the magnet.
2, object of magnet is can produce a magnetic field, a magnetic dipole, attracts the ferromagnetic material such as iron, nickel, cobalt and other metallic.
Pole judgement is a thin line hanging a magnet, pointing to the North Pole is called refers to the North Pole or N pole, pointing to the South Pole is refers to the South Pole or the S pole.
If the earth like a big magnet, the earth's magnetic North Pole is the N pole, the south poles is the S pole.
Magnet heteropolar attraction, homopolar exclusive.
Refers to the South Pole and attraction refers to the arctic, refers to the South Pole and refers to the Antarctic repel, refers to the North Pole and repel refers to the North Pole.
Usually it isn't particularly high purity natural metal, corrugated iron is higher purity, the highest at about 98%, and also has a high purity of some natural gold.
And black metal,
Relative of non-ferrous metals, should not have this kind of magnetism.
Such as copper, zinc, lead, gold, silver, aluminum, tantalum, zirconium, tungsten, etc.
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