Magnets and electromagnet power?

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SUMMARY

The discussion centers on the comparison between high voltage (5000V DC) and low voltage (12V DC) electromagnets, concluding that the strength of an electromagnet is determined by the current rather than the voltage, as per Maxwell's equations for static electromagnetics. Additionally, the claim that the attraction of a north magnet is stronger than the repulsion of a south magnet is deemed false. The conversation emphasizes the importance of rejecting misinformation from unreliable sources.

PREREQUISITES
  • Understanding of Maxwell's equations for static electromagnetics
  • Knowledge of electromagnet design and operation
  • Familiarity with the concepts of magnetic attraction and repulsion
  • Basic electrical engineering principles, specifically current and voltage relationships
NEXT STEPS
  • Study Maxwell's equations in detail to grasp their implications on electromagnetism
  • Research the principles of electromagnet design, focusing on current versus voltage
  • Explore the concepts of magnetic fields and forces, particularly attraction and repulsion
  • Investigate common misconceptions in electromagnetism and how to identify credible sources
USEFUL FOR

Electrical engineers, physics students, hobbyists in electromagnetism, and anyone seeking to understand the principles governing electromagnet strength and magnetic interactions.

Jacquesl
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Magnets and electromagnet power?

It’s said in the <crackpot link removed - Zz> e-books that high voltage 5000v DC electromagnets are more powerful that low voltage 12V DC electromagnets.

And in the permanent magnet motor it’s said that “The Attraction of a magnet ( North ) is always stronger than the Repulsion ( South ) “

Are this statement true or false, it’s starting to confuse me?
 
Last edited by a moderator:
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Please note that, per our guidelines, crackpottery (and so, free advertisement for crackpot links) are not permitted.

While there is some "value" to discussing why such crackpottery is wrong, unfortunately, considering just now many there are out there, we will be swamped with these things. We have tried it, and it didn't work.

So in case it is still isn't clear, we do not do any discussion about crackpot ideas or provide free advertisement of their websites. Period!

Zz.
 
Ok sorry, no problem with that “crackpot link” You’ll do me a favor if you can report them as fraud, if they are talking crap, did you think I’ve actually paid for that e-books, so no money is lost

But to come back to the “crackpot link” statements, are that true or false, if I’m correct this is the right place to discuss that kind of questions
 
To answer your question #2:

The North is not stronger than the south.

And #1:

Maxwell's equation for static electromagnetics states that the circulation of the magnetic field for a surface S bounded by the curve C is equal to the flux of electrical current through S divided by a constant. This means that the magnetic field is dependent on the current, NOT the voltage. So number 1 is wrong too if you put enough resistance on the high voltage case.
 
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