Magnet Basics
MAGNET is a non-profit consulting group. We grow the manufacturing industry and unlock prosperity in Northeast Ohio. Our practical consulting helps start-ups thrive and small and medium-sized companies transform with technology, innovation, and talent. Magnet definition, a body, as a piece of iron or steel, that possesses the property of attracting certain substances, as iron. Magnet to.torrent online converter. Automagically convert your Magnet links to.torrent files. Click here to go to our Repelling Force Magnet Calculator that shows the repelling force generated between two same-sized magnets. Many online calculators we've seen determine pull force based on a theoretical calculation of the flux density. With a few assumptions, flux density (in Gauss) can be related to the expected pull force. Have a cool shirt, site or suggestion to share? Let us know at hello@teemagnet.com. Share this site:.
With so many people using magnets in more and more places, we thought we would take a moment to step back and discuss some of the basics. How do magnets attract to one another? How do they repel? How can I magnetize a steel screwdriver?
Magnet Basics
A permanent magnet is an object that produces a magnetic field around itself. It is this field that enables them to stick to each other and to some types of metal. Specifically, they stick to ferromagnetic materials like iron and things that contain iron, such as steel. This includes everything from your car's steel body to your refrigerator door. They're also attracted to nickel and cobalt, and a few other rare-earth elements.
Magnets won't stick to most other types of metal, including aluminum or copper.
When will magnets attract or repel each other?
The rule to remember is that opposites attract. Every magnet has both a north and a south pole. When you place the north pole of one magnet near the south pole of another magnet, they are attracted to one another.
When you place like poles of two magnets near each other (north to north or south to south), they will repel each other.
That's how they work, but why?
The best Physics questions are often the most basic. Why do magnets act the way they do? The question is both simple and complicated, with some parts of it yet to be truly understood. It's similar to asking: Why does gravity work the way it does? Physics studies and models this phenomenon.
Electromagnetism is one of the four basic forces in the universe: electromagnetism, gravity, and strong and weak nuclear forces. It describes the force that's the result of the interaction between two charged particles. If that sounds too much like something a Physicist would say, it should! After all, thinking about some of the theoretical implications of electromagnetism led Albert Einstein to develop special relativity in 1905.
Magnetic Field
You might start with the Wikipedia article on Electromagnetism, or go as deep as the many textbooks written on Physics and Chemistry to learn more. There's more material than can be covered in one blog article!
What does Pull Force Case 1 mean?
On our product pages, we list the Pull Force of a magnet as we've measured it using specific test conditions. A good, comparative measure of a magnet's strength is Pull Force Case 1. This is the force you need to pull a single magnet directly away from a large, flat steel plate. A similar description can be found in our FAQ.
If you're wondering why Pull Force Case 3 (magnet-to-magnet) isn't listed, here's why: When two magnets are touching one another, Pull Force Case 3 is equal to Pull Force Case 1. It's the same number!
Wait a second, you say, a pair of magnets seem stronger. How can we say this? Well, first and foremost, because we've measured it many times. It might seem like a pair of magnets is stronger for two reasons: one, if you're sticking a magnet to a very thin or small piece of steel, you will see a pull force weaker than our listed Pull Force Case 1. Two, a pair of magnets that are some distance apart will pull with more strength than a single magnet at the same distance to a steel plate. At a distance, Pull Force Case 3 is usually greater. When touching, however, it is equal to Pull Force Case 1.
What magnets can be used to repel each other and hold up 10 pounds?
Using magnets to repel each other is one way to try to achieve a frictionless bearing. In practice, it can be difficult to remove all friction. While a pair of magnets will repel each other, they are not stable in this condition. One magnet won't simply float forever above another magnet.
The picture on the product page for our RX054 magnet illustrates this point. It shows one ring magnet floating over another, with one key detail: The pencil sticking through their holes provides the needed stability. You might mimic this setup in your own levitation projects.
But what about if I add another magnet in another position, to make a magnetically stable 'pocket' for the floating one to sit in? Sorry, it doesn't work that way. As you add more and more magnets, the magnetic fields interact in complex ways that are hard to summarize with simple rules of thumb. What's more, Earnshaw's theorem states that no matter what way you orient the magnets, you can't make it stable with stationary magnets alone. See the section in that article about loopholes if you're trying to get around this!
When considering the repelling force between two magnets, you must consider the distance between them. The farther two magnets are apart from each other, the weaker the repulsion force will be. Our Repelling Force Magnet Calculator offers a way to quantify these forces online. For example, a pair of RX054 magnets will repel each other with about 25 lb when touching, but only 5.4 lb when held at a distance of 1/4' apart.
How to magnetize a screwdriver, or other steel objects.
A steel object such as a screwdriver can retain a small amount of magnetism after a neodymium magnet is taken away. It won't last forever, but you can temporarily magnetize it. Here's how:
Take one end of a neodymium magnet and stick it to the base of the screwdriver's shaft. Slide the magnet along the length of the steel shaft, all the way to the end. Then remove the magnet from the shaft, and repeat a few more times. The steel is now fully magnetized!
Do not rub the magnet back and forth -- moving it in opposite directions will work to cancel each other out.
You can use this same method to re-magnetize old ceramic, ferrite or Alnico magnets. This is a great way to re-magnetize the needle of a compass. Choose a magnet sized like what you're trying to magnetize, though it isn't too critical. While the animation shows a D4X0-ND magnet, a nice D6C magnet works quite well too.
Stamford has a total of 13 elementary schools, five of which are magnet programs. There are five middle schools and three high schools. One middle and one high school are magnet schools. Stamford's magnet schools offer educational choices to parents through innovative programs of theme-based instruction. All other schools enroll students based on residence. Details about each school's programs are available on the individual school websites.
General Magnet Information
- Hart, Toquam, Westover, and Scofield Magnet Middle School are local magnet schools and enroll students from all parts of Stamford by a lottery process.
- Academy of Information Technology & Engineering (AITE), Rogers International School and Strawberry Hill, an extension of Rogers International, are Inter-District Magnet Schools and invite students from Stamford and the surrounding towns. Strawberry Hill opened in September 2016 and enrolled students in kindergarten and grade one, with one grade added each year thereafter. In 2021-2022, Strawberry Hill will include grades K-6. Rogers and Strawberry Hill have preferred areas for admission (see below).
For a full description of the Stamford Public Schools Magnet Lottery School Application process please click the link on the left to read our SPS Board of Education Policy on Magnet Schools.
Elementary, K-6, and K-8 Magnet Applications:
- Click the link below to apply to Hart, Toquam, Westover, Rogers International grades K-5, and/or Strawberry Hill grades K-6.
- Click the link below to apply for Rogers International grades 6-8.
Middle Magnet Application:
Now open until 4:00p.m. on Monday, March 1, 2021
- Scofield Magnet Middle School enrolls students from all parts of Stamford by a lottery process. The deadline for submitting Scofield Magnet School Lottery applications is Monday, March 1, 2021 at 4:00p.m.
- Click the link below to apply to Scofield Magnet.
Middle School Applicants please note: If you are interested in applying to Strawberry Hill (Grade 6), Rogers (Grades 6-8) and/or Scofield for middle school, you must complete separate applications for EACH school. The deadline to complete applications for Strawberry Hill Grade 6 and Rogers Grades 6-8 is Monday, November 16, 2020. The deadline to apply to Scofield is Monday, March 1, 2021.
Magneto
High School Magnet Application:
Now open until Friday, January 15, 2021
- AITE is an inter-district magnet high school and enrolls students from all parts of Stamford and the surrounding towns by a lottery process. The deadline for submitting AITE School Lottery applications is Friday, January 15, 2021 at 4:00p.m.
- Please click the link below to apply to AITE:
Important Dates
- Elementary Magnet School Lottery Important Dates
- The deadline for submitting Elementary Magnet School Lottery applications is at 4:00 p.m. on Monday, November 16, 2020.
- The lottery drawing will be held on Tuesday, December 15, 2020 and acceptances are due on Friday, January 15, 2021.
- Elementary Magnet School Orientation Dates
- Hart
- Tuesday, October 20, 2020 7:00p.m.
- To view the recorded orientation click here
- Rogers
- To view the recorded orientation click here
- Toquam
- Wednesday, October 21, 2020 7:00p.m.
- To view the recorded orientation click here
- Westover
- Thursday, October 15, 2020 6:00p.m.
- To view the recorded orientation click here
- Strawberry Hill
- Wednesday, October 28, 2020 6:30p.m.
- To view the recorded orientation click here
- Central Office
- Thursday, October 22, 2020 6:30p..m. Presentation in English; 7:30p.m. Presentation in Spanish
- To view the recorded orientation in English click here
- To view the recorded orientation in Spanish click here
Para ver la presentación grabada en español haga clic aquí
- Hart
- Middle Magnet School Lottery Important Dates for Strawberry Hill (Grade 6) and Rogers International (Grades 6-8)
- The deadline for submitting Middle Magnet School Lottery applications for Strawberry Hill and Rogers International is at 4:00 p.m. on Monday, November 16, 2020.
- The lottery drawing will be held on Tuesday, December 15, 2020 and acceptances are due on Friday, January 15, 2021.
- Middle Magnet School Lottery Important Dates for Scofield
- The deadline for submitting Scofield Magnet School Lottery applications is 4:00 p.m. on Monday, March 1, 2021.
- The lottery drawing is Monday, March 15, 2021 and acceptances are due on Thursday, April 15, 2021.
- To view the recorded orientation click here
- Middle Magnet School Lottery Orientation Dates
- Rogers
- To view the recorded orientation click here
- Scofield
- To view the recorded orientation click here
- Strawberry Hill
- To view the recorded orientation click here
- Rogers
- High School Magnet School Lottery Important Dates for AITE
- The deadline for submitting AITE Magnet School Lottery applications is 4:00 p.m. on Friday, Janary 15, 2021.
- The lottery drawing wiill be held on Monday, February 1, 2021 and acceptances are due on Monday, March 1, 2021.
- High School Magnet School Lottery Orientation Dates
- AITE
- To view the recorded orientation click here
- AITE