A magnet is a unique metal. When a magnet goes near a particular type of metal or some other magnets, and the two poles (sides) touching are opposite, it’ll pull, or attract the other magnet or metal closer. Besides, if the two poles are the same, the two magnets will repel, or push away, from each other.
Magnetism is one of the most fundamental elements of our contemporary society. Electric motors, tools, refrigerators, utensils, and even some games use magnets.
Magnets are strange and astonishing materials. Currently, there are still some mysteries which researchers and scientists are yet to solve when it comes to attractions and magnetism. In this article, we’ve compiled a list of some of the interesting facts about magnets.
1. The most powerful magnet in the universe is a star known as a magnetar. These are stars which had a supernova explosion and have died off. The magnetars are just leftovers, and they are powerful enough to damage small planets in the universe if they get near enough. Fortunately, there are only twelve of these according to the scientists, and they are very far away from our planet.
2. The Earth is like one large bar magnet. It has a magnetic south and a magnetic north that’s what the needle on the compass points these significant poles. Nonetheless, this is geographically different than the real south and north poles. Invisible magnetic field lines run from the north to south poles of the earth.
3. Magnets affect some animals. In fact, they’ve been used to study seasonal cycles, communication patterns of bees, and many other animal behaviors. Most animals can sense magnetic fields. For example, some sharks are repelled by them, and turtles and birds navigate by them.
4. Magnetic resonance imaging machines also use magnets, and they produce stronger fields than Earth. In fact, it’s nearly 60,000 times stronger than the Earth’s.
5. Magnets can Be Hazardous for Computers. One place you won’t find several magnets near the hard drives of computers. A strong magnet can change the stored data on the hard drive, deleting it entirely. Luckily, modern hard drives are made with some shields to protect them against this crucial problem – and it takes a very powerful magnetic to affect data it.
6. Only a few Magnets Are Permanent. When many people believe all magnets are permanent, the metallic magnets with the molecules which are arranged properly to develop a north-south alignment.
These are referred to as permanent magnets since their magnetic forces don’t change (though a metal loses its magnetic properties if it’s heated to high temperatures). Many attractions in the modern technology are temporary, developed through electromagnetic fields produced by electricity.
7. Many Modern Devices Use Some Magnet. It wouldn’t be easy to find a device in your house which doesn’t use a magnet or some magnetic field in operation. Each motor utilizes generated magnetic fields to function. Many switches, valves, and similar electrical devices also use magnets to work.
8. There are different types of magnets. Not all permanent magnets produce the same kind of magnetic field. Magnetic fields differ significantly depending on the size of the magnetic, and the type of material.
Scientists have tried to devise ways to produce stronger magnets for years. Iron and steel are used to make many everyday versions. Other elements are used to develop versions having more power. The most powerful come from rare items, like neodymium.
9. Two laboratories stores the world’s biggest magnets – The Florida State University (FSU) and the Los Alamos National Laboratory in New Mexico. The magnet in Los Alamos can reach almost 100 Teslas while the one in FSU can reach about 45 Teslas.
For those who do not know what that means; Tesla is the unit of magnetic flux density. Want to understand its power? Compare this – a magnet in the junkyard which lifts vehicles is only 2 Tesla! Now, do your calculations!
10. The discovery of the south and north poles in a magnet led to the development of the compass. The Chinese are credited with this invention since they used it to navigate the oceans several centuries ago.