Take one electromagnet and a permanent magnet. Apply the current to the electromagnet for repulsion. Try to get them repelled at small separation. You will always find that corners of both of the electromagnet and permanent magnet attract each other instead of repelling. At lower current the attraction will be heavy and at higher current it will be weaker.
On the other hand, I have found that the majority of scientists deny the attraction between the like poles. I have discussed this matter with a group of scientists. Opinion of one of the scientist about this matter: “The strength and direction of a magnetic field at any point is the vector sum of all the individual fields at that point, so the situation you describe is not possible as the field at any point will always be a single vector. So it is not possible for the unaligned domains to be attracted by the permanent magnet while other domains are repelled because the unaligned domains will be acted upon only by the net field.” Link to the discussion: https://www.thenakedscientists.com/forum/index.php?topic=75622.msg564049#msg564049
Why is this obvious contradiction between the experimental fact and the opinion of the scientist?
Hello Umer,
the experimental installation and arrangement of your magnets is not fully clear. Perhaps you visualize the magnetic flow by iron filings (separate and in superposition). The strength of the fields must be known (Tesla?).
I assume, the electromagnet has a core. The permanent magnet magnetizes the core of the opposite magnet. If the current is switched on, two fields effect on the core. So higher the current, so stronger the influence of the electromagnet. This explains the decreasing influence of the permanent magnet with increasing current.
The divergent field at the edges causes there a stronger influence of the permanent magnet.
Generally, the magnetic flow at the corners is inhomoneneously. Therfore, opposite directions of the resulting magnetic field are possible.
Yours
R. Mitdank
Hello Dr. Rüdiger Mitdank,
Thank you very much for assuming the right situation. The electromagnet has an iron-core. I am pleased that you have validated the attraction between the like poles of the permanent magnet and the electromagnet. Another scientist validates the attraction as:
"While attempting to create a repulsive force by setting the proper polarity of the current in the electromagnet, the permanent magnet is always attracting the iron core inside the electromagnet. If you take a strong magnet and an air-core electromagnet the repulsive force will be equal to the attractive force".
Now we have to investigate into the effects of the attraction.
Repulsion and attraction are opposite forces between the like poles. According to the laws of motion, the attraction force must balance a fraction of the repulsion force and the repulsion force must be reduced.
Is this conclusion correct?
Hello, Emmanouil,
Thank you very much for validating the phenomenon. However, according to my experiments, presence of some unsaturated magnetic domains is basic reason of the "attraction during repulsion".
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