Magnets Definition and 562 Threads

Hello, I have six 1*2*0.5 rectangle neodymium magnets. I don't know what to make with it so are there any suggestions? I want to make a machine or something that can move, however, I don't know much so any idea will be appreciated. Thanks!

So I've been looking at information at how magnets interact with things like credit cards, smartphones, etc. and I've noticed that there's an endless debate as to how magnets affect smartphones. I realize that it has to do with the size of the magnet and exposure, so for the sake of example...

My fundamental question is, do opposing magnetic fields eventually degrade each other over time? If they do, is there a way to mitigate or eliminate their ability to degrade one another? If I had one permanent magnet facing up and another permanent magnet facing down hovering over it (with the...

There have been things popping up about magnetic wormholes and such, are these claims true? and if they are, how does this work?

Hi Everyone, I have 4 scenarios in question . Will The EMF(Voltage) be the same in all of the scenarios? - the difference between the two photos are the polls: one repel one attract . - i understand that the current(amps) will change due to the wire length assuming same gauge 1) Photo...

Hi, I would like to make a homemade electromagnetic device. It would be a 5cm diameter metal cylinder inside of a metal pipe. I would use electromagnetism to lift the (heavy) steel cylinder up the pipe, and then release it. It's meant to be used as a sledge hammer. Can I just wind a wire...

Hi, Is it known what is the minimum force of attraction between two magnets needed for a human being to feel an attraction pull between the magnets? or is there a formula for that? Thanks!

Hi Just wanted to know, If I have two magnets of the same size with a pull force of say 30kg and use them to repel each other, the top magnet at a position close to the surface of the bottom magnet would be able to support around 30kg (I know repel force is not measured in kg). If I then...

Hi Just wanted to know, If I have two magnets of the same size with a pull force of say 30kg and use them to repel each other, the top magnet at a position close to the surface of the bottom magnet would be able to support around 30kg (I know repel force is not measured in kg). If I then...

Suppose you had a rotating magnet, about the size of a penny, about how much friction/heat could it make in watts?

Hi, I was wondering whether it was posible with a formula to measure the distance to which two equal magnets start attracting to each other. I was looking at this web page https://www.kjmagnetics.com/blog.asp?p=surface-fields-101 and I am not sure if this is the right formula. I have two...

Guys i noticed something i can't explain, i was playing with a magnet while i was studying and my hand, where the magnet was, remained near the light bulb for some seconds, soon enough i realized that a strange sound was emitting then when i moved away my hand the emission stopped. What's the...

I've just read about the discovery of non-Joulian magnets, which are supposed to exhibit a new type of behavior by expanding when exposed to a magnetic field. They do not follow the rules of classical magnetorestriction: http://www.mse.umd.edu/news/news_story.php?id=9072 How can a material...

Heya, I am new to this forum and want to start with a tricky question... There is a cylindrical neodymium magnet, d = 40mm, height = 5 mm, hole in the middle (also round shaped cylindrical) d = 10mm. There is also a pure iron ball d = 12mm. The ball is set on a non-magnetic stand at 500 meters...

I recently purchased a couple dozen 1 inch round high powered magnets as a gift for my nephew. I was playing with them the other day and noticed a fluttering feeling as I put them near my heart... and noticed there were several parts of my body that I could feel repelling or pulling as the...

Hi all, I have two identical magnet which measures 0.6T when I put my gauss meter on the top surface. I configured the magnets as below: I would like to know what should I expect if I measure the strength(Tesla)at the red round dot position? Would it be 1.2 tesla? Please advise. Thank you...

Hi all, I'm trying to generate enough current using a solenoid to intermittently power an LED. My plan is to buy some enameled copper wire and wind it around pipe. This will be my solenoid. Then, magnets will be pulled through the pipe on string or what-not and, by Faraday's Law of Induction...

Hi, this is my first time on the forums and I'm sorry if this is in the wrong place. I was wondering if I got a windmill and 2 rare Earth magnets can I stick one magnet to the blade of the fan and then use the other magnet to push the windmill to generate electricity? -Thanks

I wasn't sure where to put this so mods feel free to move, So this is a problem I'm trying to solve for a masters project and simplified it is this; I essentially have a stack of magnets all separated by 4mm each magnet is identical and produces a magnetic flux of 17.5 gauss at its centre (all...

Hi everyone...I'm just looking nmr schemes, and magnets, and, at the same time, studying Physics II and electromagnetic fields at my faculty of electronics engineering. I know this may sound like a "dumb" question, and I don't want to sound like councited or similar stuff, but I was just asking...

Does anyone know of a good source for Neodymium Magnets I tried Magnets 4 less but the website seems to be not working.

Hello all, I'm working on a little side project to build something close to a Mag-lev system. I've researched loads around the magnets and have the info' on what conditions I need, current, Field strength, etc. But I'm having issues in finding how that relates to the movement of an external...

Hey, So I am a sophomore in high school and have never taken a physics class before (it hasn't been offered) but I look forward too taking one. I got really thoughtful today and came up with three questions. 1. Gravity... is it energy? And is it infinite? I mean we harness gravities energy...

I have several bar magnets with the north and south poles labeled on them. It is my understanding that a compass itself is a tiny magnet and the north (often the red part of the compass) end is itself a north polarity. This means that this end would point towards a south pole of a magnet. From...

When reading about the quantum explanation of permanent magnets, I only read about electron spins. Sure, but are they behind that aggressive attractive force existing between opposite poles? Common sense tells me the only things that should attract each other in a metal are electrons and...

I have a conservation of energy question I’ve asked about elsewhere but I didn’t get a fully satisfying answer. I hoping someone here can help. TIAhttp://wedgecircles.com/images/384_newmpe01.gifSay you have two magnetically aligned magnets close to one another but some distance apart. There...

I was interested to know as magnetism works in space. Can magnets be used to bend space-time? If this is possible may be able to time travel.....

If we can create a magnetic field with a solenoid, why can not we generate electricity with magnets?

In all demonstrations of Lenz's Law that I've seen about the falling magnet, the diameter of the magnet is roughly the same size as that of the tube. Would there be any difference if the magnet was significantly smaller?

Ok I have a question that I cannot find a answer anywhere on the Web for so I'm going to try to explain it best I can. So if I stacked 10 magnets in a plastic tube, s-n-n-s-s-n-n-s-s ect... and each magnet had a repel of 10lbs, would the total repel be 10 pounds when compressed or would it be...

I like magnets clearly, and will most of the time use this forum to get help with things google cannot help me with. :)

Dear Friends Could anyone tell me how to calculate the Repulsive Force of an Magnet, If i use one magnet with strong Magnetic Field compared to Other. Thanks in Advance

I'm doing my best at learning electricity & magnetism for the first time and I could use some help. Let's say I have two horizontal bar magnets moving horizontally towards each other at constant velocity. The changing B field should induce an electric field gradient in the perpendicular...

When you take two magnets one being positive, the other negative. What is the chemical makeup of these two magnets that makes them repel each other. And if I have this correct, electricity is caused by magnet coils spinning around which generates electricity. What is it about magnets (especially...

Suppose there are 2 sets of magnets housed inside a box.One set can move vertically and the other set moves horizontally.Now if enough repulsion is created between the vertical set's magnets the top magnet will touch the box's body and try to go out but can't.So if I keep the repulsion going...

Hello everyone! I am a high school physics teacher, and I am witnessing something with a piece of classroom equipment I can't quite explain: I have a bar magnet with three poles. There's a North pole on the top AND bottom, and a south pole in the middle. This would make sense if two magnets had...

There is something I am confused about when it comes to the force between two parallel wires carrying current, specifically why when they carry current in the same direction the wires are attracted to each other. I understand that when you use Flemming's left hand rule and consider the electrons...

I've been trying to figure this out for hours.. been studying for my final exam. Can somebody please help me? Are there any differences between the magnetic field around a permanent bar magnet and electromagnet? Any similarities?

I've been searching for a simple answer online and on this site, but I haven't been able to find anything that explains this for me. Simply, is there an equation that can be used to calculate the force of attraction between two magnets? I am interested in when two magnets are touching, how much...

Hi people, so i literally made an account to ask this question, i know many of you might think what i am going to ask is incredibly inane, but i just have to know. Is it conceivable, or even in the realm of possibility, that we could fly an incredibly strong magnet over areas where ISIS is...

Hello all, as the title states I'm trying to build an arduino powered chess board. The chess pieces will have magnets on the bottom and each square of the board will be equipped with a reed switch for detecting the presence of the magnetic field produced by the magnet. I recently tried this out...

Never mind the title. It could be New York City to Newark. The idea is thus: Permanent Magnet Rail - Train Now imagine a train running on rails, and permanent magnets arranged on the side of the train, suitably arranged so as to cause forward motion of the train? I am not familiar with...

Ever get a simple question that leads you down a rabbit hole? A friend of mine asked me "how much stronger are rare Earth magnets than regular iron magnets", and I was given pause for thought, since I realized that I didn't really know much about how the relative "strength" of magnets are...

hi, I'm a student and i have an electromagnet and a bar magnet paced head on coaxially and i want to calculate the force between these two when the distance is around 0.5 cm. please help I'm unable to find anything useful after browsing various websites. Thanks in advance.

Hi all, I've got a quick clarification question. Generally when the production of electromagnetic waves are discussed, it's done in the context of an accelerating electric charge. Is it possible to generate EM waves by instead accelerating something like a permanent magnet? I.e. if I wiggle a...

I am a lighting designer for tv shows and I have a problem with a location that has very low ceilings and 22" timber beams running the width of a 30ft room. The location is a listed/heritage building and therefore we cannot cause any physical damage to the property including the ceiling. I...

First time writing , hope all goes well. Looking to understand the properties of rare Earth magnets, are you able to reverse the polarity of two magnets that are stuck together and separate them with an electromagnetic pulse or any other instrument ? Please if this is the wrong forum ...

Hello, recently I have found this diagram http://www.cropcircleconnector.com/images/part4-12.jpg Also seen some videos on youtube. If this really work in moving a magnet linearly, the first thing that someone may think is why not to combine this linear motor into a circle, to move a magnet...

please delete this post Hello, Accidentally I have noticed a strange behaviour using two different magnets, which I would like to discuss. The picture shows a disc magnet (shown also in the right to see the magnetization) with it's N facing upwards. Onto the disc magnet N side, a cylinder...

Hi I am trying to find the equations of a charged particle inside a dipole & quadripole. Practically, I need to write a simulation program for it which assumes a beam passing through a dipole-quadripole-dipole which are setting around an arc. Is there some recommended literature ? Of course...