![]() Once the permanent magnet is taken away, the paper clips lose their magnetic properties. Every paper clip becomes a temporary magnet attracting other paper clips in the presence of a magnetic field. You must have seen how paper clips get attached to each other when a permanent magnet is nearby. They become magnetic in the presence of a strong magnetic field. Soft materials with low magnetic properties, such as annealed iron and steel, are examples of temporary magnets. When these conditions are no longer present, they lose their magnetic fields. Temporary magnets, as the name suggests, only retain their magnetic properties under certain conditions. It is due to similar conditions existing in the earth’s core that it behaves like a permanent magnet. This temperature is different for materials and results in the permanent alignment of domains in one direction. There are various ways to align them but the most reliable method is to heat the magnet to a certain temperature. In ferromagnetic materials, the domains are perfectly aligned. Domains are the minuscule magnetic fields that are present in a material’s crystalline structure. A material displays magnetic properties when its domains are aligned in the same direction. To understand permanent magnets, we must look at the internal structure of magnetic materials. Thus, they are stable against demagnetising forces. Permanent magnets are made of ferromagnetic materials that do not stop producing their magnetic field regardless of external influence. Permanent magnets produce a magnetic field due to their internal structure. Let’s take a deeper look into each of them. Using this as our basis, we can classify magnets as: One way to differentiate magnetic metals from each other is by how long their properties are active. There are various classifications for magnets. This amazing relationship between electricity and magnetism has resulted in many ingenious devices and applications. Similarly, bringing a magnetic field near a good conductor of electricity, electric currents start flowing in the conductor. When an electric current passes through a wire, it creates a circular magnetic field around the wire. As a result, it creates a noticeable magnetic field around the metal.Įlectric current is also capable of creating magnetic fields and vice versa. But in case of a large number of unpaired electrons, this infinitesimally small magnetic moment becomes large. When these spins are balanced, the net force is zero. Electrons have spin, which creates a tiny magnetic dipole. Like an electric current, magnetism is caused by electrons at the elementary level. Some materials, though, can be magnetised or demagnetised depending on the requirements. Magnetism is a property of certain materials by default. Magnetic fields that permeate different mediums mediate this force. In layman’s terms, magnetism is a force that can attract or repel magnetic objects. ![]()
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