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Magnets are generally classified into permanent magnets and soft magnets. Iningi lezinto zokwakha njengoba uMagnitizer kanye ne-electromagnets zingama-south othambile, ubumbano lwalo luyahluka njengoba ubukhosi bamandla kazibuthe asetshenzisiwe kulokhu izinguquko; and permanent magnets, ie hard magnets, are magnets capable of keeping their magnetic properties for a long time, which are not easily demagnetized, and are not easily magnetized, either. Therefore, no matter in industrial production or in daily life, a hard magnet is one of the most commonly-used powerful materials.
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