磁石兩極問題

Your refrigerator is NOT a magnet. The casing of the regrigerator is made of iron, which is a ferromagnetic substance that can be attracted by permanent magnets through the process of induced magnetism.

When you cut a permanent magnet into small pieces, each of which will become a permanent magnet that has two poles. A magnet is due to the presence of atomic magnetic dipoles that aligned in an order manner inside the substance. Hence, unless you could cut the piece into such a scale smaller than the size of an atom (which is physically quite impossible using appliance in daily life), the cut piece will still behave like a permanent magnet.

一係你個雪櫃唔係鐵，一係你個磁石係假既，因為冇磁石係吸唔倒鐵既。你都係退貨好D！