Electromagnetic Repulsion Power

In summary, the experiment involved coiling a 28awg wire and connecting it to an AA battery to create an electromagnet. The electromagnet was initially unable to pick up nuts but could attract and repulse in the presence of a permanent magnet. However, when a piece of iron was added to the center of the coil, the strength of the magnet increased and it could now pick up nuts. The issue was that both poles of the permanent magnet were now attracted to the iron core. To achieve repulsion with the electromagnet, the options were to increase the number of turns or the voltage. It was also noted that the repulsion force would always be weaker than the attraction force in this situation.
  • #1
Jakeeis
4
0
So I coiled ~3' of 28awg wire in a 1/4" coil and connected it to an AA battery. It is unable to pick up nuts but still attracts and repulses in the presence of a permanent magnet. When a piece of iron is added to the center of the coil the strength of the magnet increases, as expected, and it is now able to pick up nuts. The problem is that now both poles of the permanent magnet are now attracted to the iron core. How can I achieve repulsion with the electromagnet? Would more turns or voltage help?

Thanks for your help!
 
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  • #2
Jakeeis said:
The problem is that now both poles of the permanent magnet are now attracted to the iron core. How can I achieve repulsion with the electromagnet? Would more turns or voltage help?

Hi
and welcome to PF :)

yes many more turns and a few more volts...
At the moment the magnetic attraction of the permanent magnet to the iron core far exceeds the magnetic field strength of your electro magnet

cheers
Dave[/QUOTE]
 
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  • #3
Jakeeis said:
How can I achieve repulsion with the electromagnet? Would more turns or voltage help?
The permanent magnet is obviously a lot stronger than your electromagnet so the induced magnetisation in the iron, due to the permanent magnet - and which will cause attraction, is stronger than any magnetisation that your electromagnet can produce. So the net resultant of the two magnets still causes attraction. If you could actually measure the forces involved, I am sure you would measure a smaller force with your electromagnet on 'repel' setting. You could use a small Force Meter or weak spring or you could even hang the iron on a string cradle and see if the angle it hangs at is altered with and without current flowing.
 
  • #4
That makes sense. But does this mean that the repulsion force will always have a lower magnitude than the attraction force?
 
  • #5
until you make the electromagnet stronger, yes
 
  • #6
Thanks for your help!
 
  • #7
Jakeeis said:
That makes sense. But does this mean that the repulsion force will always have a lower magnitude than the attraction force?
The Iron is passive and will take a 'polarity' which is due to the stronger of the two fields. So you will always have a field vector that is a product of the cancellation of the two fields you put it in. The resultant will always be less in magnitude than either of the two.
I don't think there is anything inherently asymmetrical about the situation you describe so your 'repulsion' term only means 'attraction' to the other (winning) magnet.
 

1. What is electromagnetic repulsion power?

Electromagnetic repulsion power is a fundamental force of nature that describes the interaction between electrically charged particles. It is responsible for the repulsion between two like charges and is a key component of the electromagnetic force.

2. How does electromagnetic repulsion power work?

Electromagnetic repulsion power is based on the principle that like charges repel each other. This means that when two positively charged particles or two negatively charged particles come near each other, they will push away from each other. This force is mediated by photons, which are the particles of light.

3. What are some real-world applications of electromagnetic repulsion power?

Electromagnetic repulsion power has numerous applications in our daily lives. It is the force that holds atoms and molecules together, allowing for the formation of matter. It is also the force that allows magnets to repel each other and levitate objects. Additionally, it is used in technologies such as MRI machines, particle accelerators, and electric motors.

4. How does the strength of electromagnetic repulsion power compare to other forces?

Electromagnetic repulsion power is one of the four fundamental forces of nature, along with gravity, the strong nuclear force, and the weak nuclear force. In terms of strength, it is the second strongest force, after the strong nuclear force. It is much stronger than gravity, but weaker than the strong nuclear force.

5. Can electromagnetic repulsion power be harnessed for practical use?

Yes, electromagnetic repulsion power can be harnessed for practical use, as evidenced by its various applications in technology. However, it is important to note that this force is only present on a small scale and does not have a significant effect on macroscopic objects. Therefore, it is not a viable source of energy for everyday use.

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