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永磁体有条形磁铁及蹄形磁铁,在中学物理实验中应用较多,用久了或保管不妥都会使磁性大大减弱,影响了实验的效果。现介绍一种利用J1201多档低压电源(因J1201低压电源有过载保护且电流大)及万用变压器部件进行充磁的简单方法。
Permanent magnets have bar-shaped magnets and shoe-shaped magnets, which are used in many middle school physics experiments. If they are used for a long time or they are improperly stored, they will greatly weaken the magnetic properties and affect the experimental results. A simple method of using J1201 multi-gear low-voltage power supply (for which the J1201 low-voltage power supply has overload protection and large current) and multi-purpose transformer parts is introduced.