Main Question or Discussion Point
Im working at this at the moment on this and i was wondering if is posible to reverse polarity of a permanent magnet without expending huge ammounts of energy and keep that polarity
Please don't mislead the poster with vague and erroneous comments. What you said makes very little sense and your concepts are incorrect.usp8riot said:Newton's law applies here. You would have to have a force equal or greater than the magnetic field of the magnet to which it is applied.
I would strongly suggest that you sit down and devote some time to reading basic high school and then college level Physics texts (not pop science books) cover to cover. You really need to acquire a proper foundation in Physics if you want to talk about it. At the moment you are uninfomed or (worse) misinformed about a lot of basic Physics. Nothing wrong in being uninformed, anyway, we've all been there. The important thing is to work toward acquiring correct knowledge.usp8riot said:Yes, it maybe seems vague if you don't know the concept. All energy can be negated with energy of equal or greater value. It is a scientific fact. What is wrong with my statement? Did that not answer his question. Short answer, no. Not without equal or greater work. And I take it as 'huge' amounts of energy mean more than the original energy the magnet is exerting. Is that still too vague?
Say what? You give the impression that you don't know what Newton's laws are.usp8riot said:Newton's law applies here. You would have to have a force equal or greater than the magnetic field of the magnet to which it is applied.
Say what?All energy can be negated with energy of equal or greater value.
Is that not what I just said?It generally takes more energy to reverse the polarity of a magnet than it did to originally magnetize it, which should make sense since you have to reverse the domains.
Of course it takes a magnifying field to reverse a magnifying field. Is this not vague? I posted pretty much the same thing and you're down my back except I didn't say it takes a magnifying field. I assumed he already knew it would take another magnetic field. Did you not understand when I said all energy can be negated by energy greater than or equal to it? Why did that get a 'say what', you do know physics, right? And of course Newton's first law would seem vague to you at the level we're talking. But down past the molecular or atomic level, magnetism is forces which are allied with each other and require forces to act upon those with equal or greater force to change the polarity. Geez, is this some sort of newb annitiation ritual?It requires a very strong magnetizing field.
Yes it is, welcome to PF. Consider yourself initiated. I kind of understood what you were saying, but when helping others here, it's a good idea to try to make the statement so it will be fairly clear to the OP (original poster). I understood your metaphor of Newton's Laws, but that might have been a pretty big leap for the OP to understand.usp8riot said:Geez, is this some sort of newb annitiation ritual?