Magnetism

What is magnetism? This is a question that has puzzled scientists for centuries. Even today, we are still learning new things about magnetism and its properties. In this blog post, we will explore what magnetism is and how it works. We will also take a look at some of the basic principles of magnetism and how they apply to our everyday lives. So what is magnetism? Read on to find out!

What is Magnetism?

Magnetism is what happens when a substance gives off an invisible magnetic force. There are two main types of magnetism, ferromagnetism and diamagnetism. Ferromagnetism is what makes objects like iron, nickel and cobalt attracted to magnets (and become permanent magnets themselves). Diamagnetic substances, on the other hand, are repelled by magnets.

Magnetism Definition

Magnetism definition says that it is a class of physical phenomena that are connected by magnetic fields. Magnetic moments and electric currents of elementary particles act as catalysts for a magnetic field, which acts on other currents and magnetic moments. All materials experience some form of magnetism.

Magnetism does not require electricity or wires, but it does need the presence of a magnetic material. 

The strength of a magnetic field depends on how quickly the electric current changes direction and how much current there is. Magnets can be created by passing an electric current through a coil of wire. The coil will become a magnet as long as the current is flowing.

This magnetism definition makes it clear what magnetism is, but what are magnets? Magnets can be made of iron, nickel or cobalt. They attract and repel other magnetic materials such as steel and certain metals like iron and nickel. The force exerted by a magnet on another material at a distance is known as the magnetic force. Magnets have two poles, a south pole and a north pole. Like poles repel each other while opposite poles attract each other.

The Basic Source Of Magnetism

The basic source of magnetism is electric currents. Moving charges create a magnetic field around them, which in turn can attract or repel other objects with magnets inside them. You can see this force at work when you use a compass- the needle points towards the Earth’s north pole because it’s a magnetic substance and it’s attracted to the Earth’s magnetic field.

A magnet can be thought of as a molecule with an “invisible force” around it, which gets stronger when you get closer to its centre. This force is what makes magnets stick together when they’re close enough (though not too close). In order for two things to attract each other, they must both have some kind of magnetism- what type exactly is not important here, just that there’s a magnetic force between them.

Magnetism is also what makes it possible for electric currents to travel through wires without being affected by gravity or friction (which would otherwise make them stop moving). This means that if you have a current running through a wire, it can create a magnetic field that will attract or repel other magnets.

Types of magnetism

There are three types of magnetism: permanent, electromagnetism, and induced. Permanent magnets are materials that create a magnetic field around themselves without any external input. Electromagnets require electricity to create a magnetic field, while induced magnets only become magnetised when in the presence of another magnet. All three types of magnetism rely on the magnetic dipole, which is what causes magnets to attract and repel.

Permanent magnetism

Permanent magnets are materials that create a magnetic field around themselves without any external input. They can be made from iron, cobalt or nickel, but also from rare earth elements like samarium and neodymium (NdFeB). They are usually made by compressing or heating the materials until they turn into magnets, which can take up to two years. The stronger the magnetism, the longer it takes to create a magnetic field around itself and vice versa.

Electromagnetism

Electromagnets require electricity to create a magnetic field, while induced magnets only become magnetised when in the presence of another magnet. All three types rely on what is known as the magnetic dipole effect, which causes magnets to attract and repel each other by spinning off electrons from their atoms that are aligned with their own spin axes; this is what creates the magnetic field. Electromagnets are created when an electric current flows through a wire that is wrapped around an iron core. The more wraps of wire, the stronger the electromagnet will be.

Induced magnetism

Induced magnets only become magnetised when in the presence of another magnet. This type of magnetism can be seen in some metals such as iron, cobalt or nickel. Magnets with opposite poles attract each other and those with like poles repel one another due to what is known as the magnetic dipole effect.

The North Pole of a magnet is where its field lines are coming from (when it’s pointing towards you) and the South Pole is where they are going to (when it’s pointing away from you). A magnet that has two North Poles or two South Poles will repel each other because their magnetic fields are trying to push in opposite directions. You can test this by putting a paper clip on one end of your magnet and holding it up with another hand; if it falls off, the magnet isn’t strong enough. If it stays on, the magnet is strong enough to hold the paper clip against its own weight.

Conclusion

Magnetism is an amazing force that we often take for granted. Magnetic materials have a number of unique and interesting properties that can be harnessed to do some pretty cool things. In this post, we’ve given you a crash course in the physics of magnets – from their basic properties to more complex concepts like flux and Faraday’s law.