Why does the bonded NdFeB magnet break after it breaks?

The rectangular bonded NdFeB magnet has N and S poles at its ends. If it is broken into left and right, then does its polarity become N and S poles and S pole and N pole?

Why does the bonded NdFeB magnet break after it breaks

It is found through experiments that the polarity of the bonded NdFeB magnet after breaking is different from the polarity we imagined. Why can the left half of the magnet remain unchanged at the N pole, and the right half of the right half is originally S? Then it turned into an N pole? What is the law that causes the left magnetic pole order to change, while the right magnetic pole order changes. We can first assume that the magnet is originally N–S pole. After disconnection from the middle, it should be the N–S and N–S grades, but this is not the case. It becomes N–S and S–N. It is not material. Symmetrical? Why does the magnetic pole on the right change, but the left one does not change. In fact, no matter whether it is left or right, only one side has changed and the other side has not changed. The reason remains to be explored.

1. The direction of the magnetic induction line inside the common strip-shaped NdFeB magnet is not as standard as stated in the book. It points from one end to the other end, but an arbitrary diagonal line, not parallel to the three sets of edges of the magnet. . Moreover, the magnetism of the magnet can still be considered to be uniform. This is because most of the magnets are cut directly from the magnetite ore in a random direction.

2, bonding NdFeB magnets can be seen as six faces, three are the North Pole, three are the South Pole, and each of the two opposite faces is magnetically opposite.

3. After the magnet is disconnected from the middle, there is no such thing as magnetic reversal of a certain magnet. The magnetism of the magnet section is still opposite.

4. The two magnets are magnetically identical to each of the four faces adjacent to the magnet cross section.

5. Due to the similarity of the ring-bonded NdFeB magnet, a repulsive force is generated between the sections.

6. Turn one of the magnets 180 degrees over. The cross-section of each of the two magnets and the corresponding faces of the four adjacent faces are opposite in magnetic force, generating a gravitational force. So at this time the magnets are attracted.

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