How can it be regarded as a valuable strong magnet, and how to distinguish Now many people know that strong magnet is more valuable, but they are not very clear about what kind of strong magnet is, because there are many kinds of magnets, and some people ask whether it is strong magnet if the [...]
If a magnet keeps doing work, will its magnetism be weakened or even disappear? There are many misconceptions about magnets and how they are magnetic. Since the magnetism of a magnet is invisible and intangible, it will be more abstract in the eyes of many people, and it is difficult to reflect it intuitively. First [...]
Giant Magnetoresistance Have you ever sat around on a rainy day contemplating your computer’s hard disk drive? Though often taken for granted, this magnetized device makes it possible to store and retrieve information digitally – in everything from video games to iPods to your personal computer. The first hard disk drives (HDDs) date back to [...]
Do Microphones Need Magnetism To Work Properly? Magnets and microphones play huge roles in our everyday lives. You may have read somewhere that magnets play a central role in microphones. Is this true? Do Microphones Need Magnetism To Work Properly? Dynamic mics (moving-coil and ribbon) convert energy via electromagnetic induction and have built-in magnets around [...]
Why & How Do Headphones Use Magnets? Magnetic materials and magnetic fields are all around us, but it may come as a surprise to you that the headphones you’re wearing have magnets, too! Why & How Do Headphones Use Magnets? Headphones act as transducers of energy, converting electrical energy (audio signal) into mechanical wave energy [...]
Magnets In Loudspeaker Drivers Magnets In Moving-Iron Loudspeaker Drivers The moving-iron loudspeaker was the first effective electromagnetic loudspeaker design. Today, the design is pretty well relegated to balanced armature headphone drivers, but this driver type is still worth mentioning. Let’s have a look at the balanced armature headphone driver design to explain the magnets of [...]
Why And How Do Speakers Use Magnets & Electromagnetism? Magnetic material and magnetic fields surround us in our day-to-day lives, from the refrigerator magnets to the Earth’s magnetic field to the speakers in our homes, on the stage, in our cars, etc. Why and how do speakers use magnets? Speakers are transducers of energy that [...]
Precise multi-pole magnetic component and manufacturing method thereof Abstract A method is proposed to manufacture a precise multi-pole magnetic component for using in magnetic encoders. A special layout of the circuit pattern is designed and formed on a printed circuit board (PCB). Alternate and regular magnetic field is induced according to Ampere's law after a [...]
The Relationship Between Electricity and Magnetism Together, these two phenomena form the basis for electromagnetism Electricity and magnetism are separate yet interconnected phenomena associated with the electromagnetic force. Together, they form the basis for electromagnetism, a key physics discipline. Key Takeaways: Electricity and Magnetism Electricity and magnetism are two related phenomena produced by the electromagnetic [...]
The History of Electromagnets The relationship between electricity and magnetism wasn’t thoroughly studied until 1873 when physicist James Maxwell observed the interaction between positive and negative electrical charges. Through continued experimentation, Maxwell determined that these charges can attract or repel each other based on their orientation. He was also the first to discover that magnets [...]
How Electromagnets Work What do a wrecking yard, a rock concert and your front door have in common? They each use electromagnets, devices that create a magnetic field through the application of electricity. Wrecking yards employ extremely powerful electromagnets to move heavy pieces of scrap metal or even entire cars from one place to another. [...]
1800 After History of Magnetism and Electricity 1820 - Electromagnetism, Current In 1820, a physicist Hans Christian Oersted, learned that a current flowing through a wire would move a compass needle placed beside it. This showed that an electric current produced a magnetic field. Andre Marie Ampere, a French mathematician who devoted himself to the [...]
Electromagnetic Induction While Oersted’s surprising discovery of electromagnetism paved the way for more practical applications of electricity, it was Michael Faraday who gave us the key to the practical generation of electricity: electromagnetic induction. Faraday discovered that a voltage would be generated across a length of wire if that wire was exposed to a perpendicular [...]
Permanent Magnets Magnetism and Electromagnetism Centuries ago, it was discovered that certain types of mineral rock possessed unusual properties of attraction to the metal iron. One particular mineral, called lodestone, or magnetite, is found mentioned in very old historical records (about 2500 years ago in Europe, and much earlier in the Far East) as a [...]
Magnet Attracting Repulsion Principle Magnet Attracting Repulsion - Now more and more people are using magnets, we want to discuss some of the most basic issues with you first. How do magnets attract each other? How are they excluded? How to make the screwdriver magnetized? Magnet basics magnets can attract each other or repel each [...]
Magnetism Electricity: Theory of Electromagnetism Electromagnets show that you can make magnetism using electricity. In fact, as European scientists discovered in the 19th century, electricity always makes magnetism when it moves about or changes. Every time an electric current flows in a wire, it generates a magnetic field all around it. Changing electricity, in short, [...]
Rare Earth Permanent Magnet Application Classification based on Operation Principle Rare earth permanent magnet can be classified into five types according to its operational principle, includes Lorentz Force Effect, Ampere’s Circuital Law, Faraday’s Law of Electromagnetic Induction, Coulomb’s Law for Magnetism and other magnetic effects. Actually, each operational principle has extremely widespread application area. Lorentz Force [...]
What Is A Magnetic Wormhole? - You may remember wormholes as a phenomenon of science fiction capable of transporting objects over great distances due to a wrinkle in space and time from references in pop culture such as Star Trek or Interstellar. But wormholes are much more than works of science fiction as was recently [...]
Electromagnetism - To create a magnet or magnetic field, we are going to have to look at how they are generated. The relationship between current and magnetics field behave according to the right-hand rule. As current passes through a wire, a magnetic field forms around the wire in the direction of your fingers as they [...]
Electromagnetic - Electromagnetism is one of the four fundamental interactions of nature, along with strong interaction, weak interaction and gravitation. It is the force that causes the interaction between electrically charged particles; the areas in which this happens are called electromagnetic fields. Electromagnetism is the force responsible for practically all the phenomena encountered in daily [...]
