Ternyata Ini Dia Sifat Sifat Magnet yang Jarang Orang Tahu Banyak Orang

Illustration of Magnetic Properties (freepik)

YOGYAKARTA - Many people have known magnets since childhood, but it is not necessarily fully understood the nature of magnets. In fact, this concept is an important foundation in basic physics lessons.

Magnets are not just cute souvenirs that stick to the fridge. Their existence touches many aspects of modern life ranging from electric motors to MRI technology in hospitals. Interesting, right?

What is a Magnet and Why is it Important to Learn?

As reported by the okonrecycling website, a magnet is understood as an object that is able to produce a magnetic field around it and attract certain materials towards it. This phenomenon has been known and studied by humans since thousands of years ago.

But don't get me wrong, magnetism is not just about objects sticking or not sticking. The science behind it is much deeper than most people imagine. That's why this topic remains relevant, both for students and anyone who is curious about how the world around them works.

Magnetic Properties You Need to Know

The following are the properties of magnetism that need to be understood, not only for exam purposes, but also to understand the technology you use every day.

Having Two Poles: North and South

Every magnet always has two poles, namely the north pole and the south pole. The two cannot be separated, even if the magnet is cut in half, each piece still has two poles. Pretty amazing, right?

The Pole of Senama is Pushing and Pulling, the Pole is Pulling and Pulling Differently

This is a basic law that you must remember. The same two poles will repel each other, while the opposite poles will attract each other. This principle is the basis of the work of many modern technologies, from speakers to electric motors.

Magnetic Style Working Without Direct Touch

Magnets are able to influence other objects from a certain distance without having to touch them. This force works through the magnetic field surrounding it. That's why a paper clip can move closer to a magnet even though it hasn't actually touched it.

Read also: Become a Fundamental Component in Electronic Devices, How Do Transistors Work?

Has a Magnetic Field Around it

Around each magnet there is an area called the magnetic field. This area is not visible, but it has a real effect on objects around it. The shape of this field is often visualized through the pattern of iron powder in a simple science experiment.

Can be Temporary or Permanent

Not all magnets are permanent. There are temporary magnets that lose their properties once the external magnetic field is removed. While permanent magnets retain their magnetic properties for a much longer period of time.

Weakened by Heat or Impact

Heat can significantly damage the magnetic properties. When heated to a certain temperature (known as the Curie temperature) the magnetic properties will disappear completely. Iron, for example, loses its magnetism at a temperature of 770°C. A hard collision can have a similar effect.

Types of Materials that Can Be Affected by Magnets

Not all objects react the same to magnets. There are three main types you need to know, including:

Ferromagnetic materials such as iron, nickel, and cobalt are the most strongly attracted to magnets and can be used as permanent magnets. Paramagnetic materials such as aluminum are only slightly attracted and do not retain magnetic properties. Meanwhile, diamagnetic materials such as copper and water are actually slightly repulsive to magnets.

This difference is of great importance in the recycling industry, where magnetic properties are used to separate metal types efficiently and accurately.

The Application of Magnets in Everyday Life

Magnets are everywhere, even in places you didn't expect before. The speaker in your phone uses magnets to produce sound. The compass works thanks to the interaction between the small magnets inside it and the earth's magnetic field.

In the medical world, MRI technology uses very strong magnetic fields to scan the body without using harmful radiation. In industry, magnets help separate metals from waste in the recycling process. Real evidence that understanding magnets is not just a matter of academics.

Understanding the nature of magnetism is not just a matter of students in the classroom. But it is part of the way we see the world more scientifically. Discover more science content, education, and the latest news presented briefly and reliably only at VOI.