
Demand for magnets in our ordinary life.
Throughout the day, you often encounter magnets often without realizing it. They play an important role in a diverse family of devices, from ordinary plush toys, laptops or credit cards to professional machines such as instrument for magnetic resonance imaging. The size of magnets fits within from just noticeable particles to industrial beasts with a weight of several tons. The aforementioned big ones are decidedly perceptible, the small ones usually tucked away inside various devices of household, office, medical, or commercial use, carrying out their unique mission in silence and being at the same time absolutely imperceptible.
Computers and electronics.
In computers magnets are utilized for recording data, for example, on hard drives. Magnets change the direction of magnetic substance on the hard disk in segments, which then depict binary data. Later the computer interprets the profile from each segment of magnetic material and converts them into data readable to the ordinary user. In miniature speakers located in computers, televisions as well as radios too use magnets. Mounted in the speaker, a wired coil and magnet change electronic signals into sound vibrations.
Magnets are everywhere.
Magnets offer a broad repertoire of implementations in the world of industry. In electric generators, they exchange mechanical energy into electricity, while electric motors use magnets to transform electrical energy in reverse into mechanical energy. During recycling, electromagnets in hoists lift and move heavy pieces of metal, some of which weighing thousands of kilograms. Mines employ magnetic separators to isolate useful metal ores from broken rock. In the food processing, such magnetic separators exclude minuscule elements of metal from cereals and remaining granular or liquid food goods. Ranchers raising cattle use magnets to catch bits of metal that cows are able to eat in the pasture. A cow ingests the magnet along with its feed. It's definitely not a joke. As the magnet travels through the animal's organism, it picks up small pieces of metal.
Medicine and health at home and work.
Magnets are found in some commonly applied medical devices, such as magnetic resonance imaging machines. They use a intense magnetic field to generate a radar radio signal from inside the body, employing the signal to compile a perfect, precise view of bones, organs, and remaining tissues. The magnet in such devices is extremely strong - thousands of times more potent than common hobbyist magnets. Another medical application of magnets is the treatment of tumors. The physician administers a magnetically sensitive fluid into the tumor region and then uses a powerful magnet to generate thermal energy in the contaminated area. The thermal energy destroys cancer cells without loss to healthy tissues.
According to the president of the Polish Radiological Medical Society, the number of radiology specialists is currently insufficient. This field is rapidly developing and opens wide perspectives, so for those deciding on this profession, it is a quite far-sighted step. The demand for these specialists is growing in the job market, especially in the capital.
Jobs in Warsaw both in performing magnetic resonance imaging and in other positions in this field can be found on the Jooble job search engine page.
What can you do with a magnet and a battery?
With a magnet and a battery, you can build a simple homopolar motor. This type of direct current electric motor uses the principle of continuously cutting magnetic field lines with a conductor. In a homopolar motor, the conductor rotates around a fixed axis, being positioned perpendicular to a static magnetic field. As the force acting on the conductor is continuous and always directed in one direction, the motor does not require a commutator, but still needs slip rings. 'Homopolar' means that the electrical polarization of the conductor and the magnetic poles do not change, which means there is no need for commutation.
Want to do an amazing science project at home? Build your own homopolar motor! It's simple and a great way to demonstrate how electric current interacts with a magnetic field. Here's what you'll need:
Neodymium magnet: This is a very strong type of magnet that is key to the project. You can find it in electronic stores or online. For example, you can use a magnet with the product code MW 12x6 / N38 - cylindrical magnet, which is available from us or MW 12x4 / N38 - cylindrical magnet.
Battery: A standard AA or AAA battery will be perfect. Make sure it's new to have full voltage.
Copper wire: It must be clean and well-conducting. Copper wire can be found in an electronics store or you can recover it from unnecessary electronic cables.
Once you have gathered all the materials, bend the copper wire into a shape that allows it to rotate around the battery - it can be a simple 'U' shape or a spiral. Then place the neodymium magnet at one end of the battery, and position the bent ends of the wire so that one touches the magnet and the other directly touches the battery.
When you complete the assembly, the wire will start to rotate! You can experiment by changing the shape of the wire or using batteries of different voltages to see how it affects the speed of the motor's rotation. This is a fantastic way to learn through fun and experimentation.
Remember only to be cautious – neodymium magnets are very strong and should not be placed near electronic devices and magnetic media like credit cards or hard drives.
The strongest magnets, made from a mixture of neodymium, boron, and nickel, are known for their impressive pulling force, making them an ideal tool not only for industry but also for home applications. Whether it's for extracting tiny metal filings from an eye or searching for a lost needle in a haystack - our magnets are indispensable. We offer three main categories of neodymium magnets: cylindrical magnets, lamellar magnets, and annular magnets, each tailored to specific needs and applications. We invite you to explore our offer and discover how neodymium magnets can make your daily life easier.
Magnet in household use?
Even though it may be not visible, to you, but in a most homes you will discover magnets magnets. Magnets full of refrigerators keep papers, bottle openers and other minuscule objects attached on metal refrigerator doors. A pocket compass uses a magnetic needle to determine the direction north. The dark magnetic strip on the back of a credit card collects data in the identical way, as a computer hard disk. Hoovers, blenders also washing machines have electric motors, which work thanks to the use of a magnet. Magnets are in phones, alarms and in toys for children. Our existence surrounding us is full of magnets.
Magnet grades (N38, N42, N52)
Q&A - Questions and Answers
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czwartek 2022-12-29T18:00:00
