![]() ![]() Its southern hemisphere counterpart is the South Magnetic Pole. There is only one place where this occurs, near to (but distinct from) the Geographic North Pole. The North Magnetic Pole is the point on the surface of Earth's northern hemisphere where the planet's magnetic field points vertically downwards. For example, they are used to change voltage in a transformer.Įlectromagnets are used to make many things work like computers, televisions, radios and doorbells.Įlectromagnetic waves Įlectromagnetic radiation including radio waves and light waves are used for communication including broadcasting and optical fiber, and for many other purposes.Įarth's magnetic poles North magnetic pole Though most large electromagnets employ many solenoids to lift heavy objects, smaller solenoids are used in everyday electronics. In addition to this coil of wire, a large piece of metal, usually iron, is placed inside the coil to increase the magnetic field made. Often, these magnets work by using a coil of wire that makes a magnetic field when there is a current in it. If you wrap the wire into a coil, the electrons spin around the coil and make a stronger magnetic domain. An electric current makes a magnetic field. ![]() They only work when electricity is running through them. One of them was found long ago when explorers found that a magnet could be used as a compass to show the direction of north & south.Įlectromagnets and electromagnetism Įlectromagnets are another kind of magnet. The electrons in the iron get 'spun' by the passing magnet just like a basketball player spinning a basketball. We can magnetize a small piece of iron by 'rubbing' it with a magnet. In a magnet, many electrons are spinning in the same direction. The more a group of electrons spin in the same direction, the stronger the magnetic force. Magnetism is caused by electrons (the negative particles in atoms that are also electric charges) spinning. If a north pole is put near a south pole, the magnets will attract each other until they stick to each other and can be hard to pull apart. This will also happen with two north poles that are put near each other. For example, if the south pole of one magnet is put near the south pole of another magnet, the magnets will repel each other. The poles of two magnets repel or attract each other. This is why a magnet must be close to an object to attract it. Magnetic things outside the magnetic field are not attracted to the magnet. ![]() Magnetic objects inside this unseen field are attracted to the magnet. Magnets have an unseen area around them called a " magnetic field". Some metals, such as aluminium, are much more weakly attracted. Most objects that are attracted to magnets have iron in them. Magnets can also repel (push away) other magnets. When magnets are put near magnetic objects, the magnet and the object are pulled toward each other. Magnetism can be made by a permanent magnet, or by electricity in a wire. In simpler words, it is a property of substances which pull closer or repel other objects. Magnetism is a force that attracts (pulls closer) or repels (pushes away) objects that have a magnetic material like iron inside them ( magnetic objects). ![]()
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