Magnets and electromagnet power?

In summary, the statements made in the conversation about magnets and electromagnet power are false. The claim that high voltage DC electromagnets are more powerful than low voltage DC electromagnets is incorrect because the strength of the magnetic field is dependent on the current, not the voltage. Additionally, the statement that the North pole of a magnet is always stronger than the South pole is also false, according to Maxwell's equation for static electromagnetics.
  • #1
Jacquesl
136
1
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?
 
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  • #2
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.
 
  • #3
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
 
  • #4
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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What is a magnet?

A magnet is an object that produces a magnetic field, which is a force that can attract or repel certain materials such as iron, nickel, and cobalt.

How do magnets work?

Magnets work by aligning their magnetic fields with the Earth's magnetic field, creating a force that attracts or repels other magnetic materials.

What is the difference between a permanent magnet and an electromagnet?

A permanent magnet has a magnetic field that is always present, while an electromagnet's magnetic field is only present when an electric current is flowing through it.

Can the strength of an electromagnet be changed?

Yes, the strength of an electromagnet can be changed by adjusting the amount of electric current flowing through it or by changing the number of coils in the wire.

What are some common uses of electromagnets?

Electromagnets have a wide range of uses, including in electric motors, generators, speakers, MRI machines, and magnetic levitation trains.

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