• A pair of like poles of a permanent magnet and an iron-core solenoid was set to be repelled using a simple device.
• At first repulsion force was produced between the like poles of the iron-core solenoid and the permanent magnet.
• When the moving iron-core solenoid had crossed some distance over the fixed permanent magnet because of the repulsion, attraction force was produced instead of repulsion force.
• The solenoid ceased to move because of the opposite force of attraction.
• The iron-core solenoid needed a reasonable amount of hand-force to be expelled from the magnetic field of the permanent magnet.
• The current was continuously put-on for the repulsion during the whole process.
In the above-given context, I request answers to the below-given questions.
1. When the flux is admitted by the low reluctance, what happens to the magnetic repulsion force that is created in the air gap?
2. Why should the strayed flux not create opposing attraction force during the repulsion?
3. Does not the basic experiment show that the opposing attraction force is usually huge?
4. Are Newton’s laws of motion wrong? If not, why should the huge opposing attraction force not balance (waste) equivalent part of repulsion force in this case?
5. Is not it true that the balanced (lost) part of the repulsion force will usually be huge because of the presence of a huge opposing attraction force?
6. Do the experiments not prove, too, that the balanced (lost) part of the repulsion force can be unbalanced (recovered)?
7. Why can we not use the recovered repulsion force to enhance the efficiency of electric motors?
Two main reasons to your all above questions are, 1. like current, the lines of magnetic force all ways follow low resistance(reluctance) path. 2 Magnetic lines of forces are having repulsion to each other, depending on the strength.
I have got an answer to a similar question on thenakedscientists.com
https://www.thenakedscientists.com/forum/index.php?topic=78477.msg591331#msg591331
“OK, If I understand you correctly, the essence of your point is something like this. A magnet is attracted to iron. The core of an electromagnet is made of iron. So, even if the electric current through an electromagnet makes it repel the magnet, there must be some residual attraction (between the iron core and tech magnet), and so the overall repulsion is smaller than you might expect.”
https://www.thenakedscientists.com/forum/index.php?action=profile;u=5729
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