Magnets Definition and 562 Threads

Hi, I hope this is the correct place to ask this. Does anyone know of a formula to calculate the force of attraction or repulsion between two magnets of diffirent sizes and strengths? Also the magnets are not parallel to each other. Any help highly appreciated.

Hey all, New poster here that will be back to ask and answer seeing as how well versed you all are. My current dilemma deals with a moving charge and the magnetic field it produces. (sorry if this is in the wrong area of the site) Basically it's this: Consider a charged particle moving...

I understand that in the bell theorem photonic spin is in a superpoistion state until one observes it. Is that also the case with electrons? If so then how come magnets are magnets? Surely the electrons already made up their minds which way their north and south magnetic poles are pointing...

Hi all ! I've looked at a strange video on the net of an obscure compagnie that pretend to create electricity (5 times more energy than it consume). This video was very entertaining, I laughed a lot. But, there was something special that intrigate me... The pseudo-scientist take a permanent...

I was surprise to find that even HowStuffWorks.com didn't have an article for 'permanaent magnets'. I was wondering, do permanent magnets always have magnetic fields aroung them? What makes them permanent?

Hi all, In one of the books I'm reading, it says that shields are only used in the presence of alternating fields. However, in some websites, I see people using magnetic shields for permanent magnets which has a magnetostatic field. I ran some simulations, and the filed of a permanent magnet...

Hi all, I have this simple question that I never really understood. A permanent magnet generates a magnetic field around itself. Is there an electromagnetic wave propagation associated with this permanent magnet? If so, what is the frequency of the wave? Thanks, Mike

Is it possible to produce electricity by using permanent magnets with no moving parts? I believe that is possible. Because AC current produced by moving armature or copper wire or some other metal in magnetic field. Then without moving wire it should produce DC or some kind of electron flow...

I have a few questions about permanent magnets: What are the most powerful permanent magnets made of? How strong do they get? What are the ways to make an already powerful magnet even stronger? I understand that placing iron behind it will amplify it. Why? I also read somewhere...

Electro magnets / DC / metal wire / vibrating? Hi, just a very basic question: I just tried making my own electro magnet (copper coil, steel core, connected to a 12V 2A DC power source) and i noticed that when i hold a metal wire (or just anything that's normally attracted by magnets) in...

hi all, Please can you help list materials that can be used to Block, Reduce, Stabilize, Increase or react with the fields from perminant magnets il start with Graphite: A Magnetic Stabilizer Coper: A Magnetic Inductor

I'm stucked on a practical in which I was supposed to find out how the magnetic force on a current carrying conductor depends on its length, current through it and the magentic field strength. After this I was supposed to plot 3 graphs. Well, I carried out the expt. using a current balance...

If the size of a magnet does not determin its strength, then what physical property does? THANX:smile:

The magnetic field around a magnet very much looks like the solution of a differential equation (which I guess it is, at least apprx). Now, can anyone give my a few simple exaples of such differential equations describing a magnetic field around a magnet?

Hi all, I need to create a very large magnetic field say 1Tesla (10000 Gauss). But I can not afford to build large electromagnets like the MRI machine. However, I have two permanent magnets that will create a static field of 5000 Gauss. My question is: can I superimpose magnetic fields...

Magnet A has twice the magnetic field strength of magnet B (at equal distance) at a certain distance and pulls on the magnet B with a force of 30N. Determine the force with which magnet B pulls magnet A. Could someone help me. I'm just starting physics in hs.

I have a formula, taken from Wikipedia: http://en.wikipedia.org/wiki/Magnet#Calculating_the_Magnetic_Force" But I didnt get the meaning of "mu" in this formula.. can anyone explain?

I was thinking of building something but I first must know a little bit more about magnets. First of all where could I buy good magnets of all sorts, with different strengths. Are there any stores like home hardware or renodepot that are known for selling magnets? Would they sell very...

is it posible to make a magnet rotate around a center point, with the use of other magnets?

I know that if you put a magnet in a coil of wire and turn it you can generate electricity, but a friend told me the more coil you use to take more electric you try to make the harder the magnet is to run, the same if you reverse it, even if you turn the coil. Why?

Ive been wondering if an electromagnet of great power has an effect on the human body, say the blood(containing iron). That is why I've been trying to bild one but all of my attempts have come out unsucesful.

Is there a substance that can be placed between two magnets that will stop one from affecting the other? If a sheet of paper is placed between the magnets it has no affect. This is obvious but what i want is a substance that can be placed between two magnets that are placed very close together...

Hi gang, Here is an easy one but nevertheless requires formula to express your postion. in terms of magnetic propulsion; I am building a tunnel with r=5cm and a sphere inserted will be approx 8cm diameter which will be propelled via electro magnetic propulsion. I'm now about to evaluate...

If I used two magnet, each being able to lift a load of 100 lb, to repel each other, what will be the total repulsive force ?

:confused: What store can I buy iron fillings from? And also wire and magnets to go with it.

I have a quick question here, and essentially, I'm wondering what are the differences between a ferrous magnet (more specifically, iron) and a non-ferrous magnet? How would you distinguish between the two? Thanks in advance; any help would be greatly appreciated.

My physics teacher explained to our class the traditional "dropping a magnet through a tube" experiment. As we all know, it slows down and takes longer than usual to fall through. However, he gave us an explanation that I am unsure about. I seem to remember reading about a different explanation...

help pls! since electrons cr8 a magnetic field due to their spin, shouldn't atoms be magnetic? o0

It is well known the magnetic force cannot do work. What causes a magnet to move in the precense of another magnet? Does the magnetization of the two magnets diminish in the proces?

Is there any way to concentrate the magnetic field of magnets like a bar magnet at a point?

HI How does a magnetic field build in a natural magnet like iron from a quantum mechanical point of view? I know it has to do with electrons spin and their orbital momentum, but how exactly does it work in a magnet? thanks

Anyone want to help w/ phys homework? It's magnets... Hello! I would SOOO appreciate any help I could get with this homework of mine! I just don't understand and my phys instructor is mean! Anyway, it's Phys 110, so it should be pretty easy for some of you, but it's hard for me... Any...

Hi everyone, I just found this forum and am happy I did, being the only physics major in my physics 200 classes (community college :( ), I feel kind of isolated. Groups of people talking about computer science classes, engineering, and I'm alone, and my instructor/advisor still asks me...

I've seen these things for sale on the web. http://www.amasci.com/neodemo.htmlhttp://www.kjmagnetics.com/safety.asp I consistently see the same claims: - they can easily pinch skin, like with a pair of pliers - they can shatter, showering you with high speed shards Are they really...

If I have a magnet of known strength (say 3 Tesla) and I have a solid iron sphere of 1 kg and it is positioned 2m from the magnet, how do I go about calculating its acceleration and so its final velocity upon reaching the magnet? Do I need to worry about gravity and starting height? I'm...

If you take 2 high powered magnets let's say the size of a silver dollar and put both in a table vice with neg poles facing each other, add some strong adhesive (superglue, gorila glue) and crank them together till the cement dries, with the same poles pressed together will this cause...

When playing around with magnets, one can notice that they attract objects from a distance. No only that, but they can also attract quite heavy objects many, many times in a row. Where does the energy that moves the objects come from/stored? Does it ever "run out"? My guess is that magnets...

What causes the force of attraction between two permanent magnets? I'm well aware that F = qv x B, but what charges are moving?

I am a bit confused about the concept of magnets. It is said that magnets attract opposites, and repel likes. Now does that refer to the material, or a magnet being attracted/repelled by another magnet? Also... If an electromagnetic apparatus is strong enough, will attract/pull just about...

I want to ask about the applications of magnets Is it possible that people who lived in a town could have health problems such as headaches, nausea, brain tumors.. due to an established plant, which distributes power to nearby towns and cities through hundreds of high-tension cables...

When a magnet is used to lift up a paperclip, clearly it gains gravitational potential energy. Where does this energy come from? Does the magnet lose energy to the paperclip? Does the magnet regain this energy when the paperclip is removed from the magnetic field? I have never heard of the...

how are lines of induction formed due to 2 horseshoe magnets that are placed side by side but no contact? Are there websites that would show me about it?

im only 15 n very interested in magnets, so i have many questions. can magnets have different strengths, and if so, how is this strength messured? What would happen to a magnet if it cannot turn or twist to make the oposite poles attract, and was stuck with like poles close together? that's all...

Ok, I am not the kind of person who likes BIG words, so this is all going to be simple. My question is this, what would happen in you polarized the haul of a spaceship say negitive(Doesn't really matter if its neg or pos), then generated an opposite field of energy behind. It would act like...

Hello all. I have a couple of questions concerning static electricity, magnets, and dissimilar materials. My first question is can a permanent magnet moved past a dissimilar material be used to give it a static charge as if the magnet were a dissimilar material of opposite charge? My second...

So a non-physicist posed a question to me the other day. He said that he heard something once that if two pennies are within close proximity of a magnet for at least a few hours, they gain some magnetic charge. When removed, they will slightly attract or repel one another. So I tried it. I...

why can certain metals be magnetised but others like copper cannot? what what is the difference between permanent magnet and temporary magnets?

I am posting this here because I have not been able to find the answer anywhere else. I know some of you might find this quite dumb of me, since I have seen some quite learned scholars in this forum, and my question is pretty basic. I am aware I might not be in the right forum. My...

Is it possible to use magnets (donut shape) to float a carbon arrow in the center of the donut (LEVITATION USING CARBON.

OK i was just wondering what would happen if you had a bunch of Iron filings at absolute zero and put a magnet near to them. Would they move or would nothing happen?