Classification of magnetic materials The wide variety of magnetic materials can be sharply divided into three groups: Soft magnetic materials (easy to magnetize and demagnetize) Hard magnetic materials (hard to magnetize and demagnetize) Semi-hard magnetic materials The soft magnetic materials have the characteristic feature of high permeability, and it is chiefly this flux-multiplying power of magnetically soft materials that fits them for their job in machines and devices. Hard magnetic materials are
(BaFe12O19) with a magnetoplumbite structure are well known as hard magnetic materials which are based on iron oxides. Hexagonal ferrites are referred to as hard because the direction of magnetization cannot be changed easily to another axis [].Barium ferrite possesses relatively high Curie temperature, coercive force and magnetic anisotropy field, as well as its excellent chemical stability and corrosion resistivity [].The magnetic and dielectric characteristics of hexagonal ferrites strongly depend
Mind Over Matter and Levitation Levitation is the ability to suspend the laws of gravity that bind us to the earth. It has a lot to do with mind over matter. A person being able to clear his or her minds and think nice, good things enable them to do things that they have never done before. Sounds unheard of, but this has been researched, tested, and even observed by people and scientists from all over the world. Extreme mental concentration is all that is needed. A great subject to prove mind
the Strength of Electromagnets Aim: To investigate into the effect that changing the number of turns on the coils has on the strength of an electromagnet. Background Information: If an electric current flows through a coil of wire a magnetic field is formed around the coil, creating an electromagnet. This is a temporary magnet, which can be switched off. There are three ways in which you can increase the strength of an electromagnet: Ÿ Increase the number of turns on the coil
in writing this paper is two fold. Goal one is to try and understand how a stationary magnet exerts force by means of a magnetic field (even across a complete vacuum). Frequently, electromagnetic fields are compared to the gravitational field. Goal two is to explore the similarities between the two types of fields to see if comparison throws any light on the mechanism of magnetic field generation. The term action-at-a-distance is often used to describe forces that travel through space and exert
There are many reasons for wanting to cool things, but whatever the reason, the Second Law of Thermodynamics dictates that cooling something will take effort (sorry, no spontaneously cool sodas). Different techniques have been developed to address this issue, each having its own limitations and ideal uses. The most commonly used method of cooling is with vapor-compression cycles, because it is fairly easy to construct a cooling device employing this method and the cost is low. In fact, conventional
doesn't move. The rotor spins in the magnetic field contained in the stator. HOW WORKS A MOTOR? The force that that turns the armature comes from the magnetic field of the armature trying to line up with the external magnetic field of the stator. This force is called torque. This torque will cause the armature to turn until its magnetic field is aligned with the external field, but no further. How does the armature continue to spin? One of the magnetic fields must be changed so that the armature
After the calorimeter constant is found we can move on to part two of the experiment, where we will test each of the four salts in the calorimeter to find out if the salt will be used for a hot or cold pack. Our goal is to first determine the q_dissolution and then to find the heat of dissolution. A -〖∆H〗_dissolution will be an exothermic reaction which indicates that the salt would go in a hot pack. While a 〖∆H〗_dissolution will be an endothermic which indicates that the salt would go in an ice
I was wrapped in cassette tapes while creating this poster. With the choosing of quotes, and the random ideas flowing through my head, this was the result. The following quote, “[t]his one tape had all these memories and feelings and great joy and sadness,” (Part 2, Page 62) from The Perks of Being a Wallflower, by Stephen Chbosky, was chosen due to the meaning hidden within. The overall meaning to this quote is that this tape is the thing that makes Charlie, the protagonist, feel real. Firstly
Introduction Produced sound from speakers has become so common and integrated in our daily lives it is often taken for granted. Living with inventions such as televisions, phones and radios, chances are you rarely ever have days with nothing but natural sounds. Yet, few people know the physics involved in the technology that allows us to listen to music in our living room although the band is miles away. This article will investigate and explain the physics and mechanism behind loudspeakers – both
purpose of this paper is to talk about magnetic monopoles, their history, synthetic monopoles, and their applications. Although natural monopoles have yet to be discovered and we are still testing the development of synthetic monopoles that are far from perfect, monopoles, with their unique properties would bring dramatic changes to our society and would rapidly move up to the next level of technology. Hypothetically speaking, monopoles could be used to create a magnetic train similar to maglevs, and a
magnetism. Someone who has not been educated a great deal on the topic usually will not realize how big of a role electricity and magnetism play into their everyday life, and even life on earth. The phone they carry in their pocket, the invisible magnetic field of the earth keep life sustainable, and even the electrical signals that his or her own heart uses to pump blood to distribute throughout the body are all applications of the physical laws of electricity and magnetism. On the horizon lie endless
From the roaring twenties, through the hippie seventies, until today music has altered the natural lifestyle of humans and what better way to listen to music then through compact headphones. Overtime, headphones have evolved from big over-ear headphones to smaller compact ones. Headphones have brought about an extreme diversity of music throughout different cultures. The first headphones were in vented by a man who goes by the name of Nathaniel Baldwin. He built the first headphones back in 1921
what we now call “faith healing.” To this day, people continue to experiment with magnetic therapy. The magnetic devices that are claimed to be therapeutic include: magnetic bracelets, insoles, knee and wrist bands, back and neck braces, and even pillows and mattresses. Magnetic therapy has become so common that a Google search for “magnets and pain relief” returns over 700,000 results. Some advocates of magnetic therapy claim magnets to be a strong alternative to conventional pain medication
“Neither a wise man nor a brave man lies down on the tracks of history to wait for the train of the future to run over him,”- President Dwight D. Eisenhower. Maglev is a new type of train that uses magnets to levitate above the track and reduce friction. Maglev can go up to a speed of 310 mph (500 km/h) allowing people to travel on land much faster than before. The researcher will create a model Maglev and see which system, EMS or EDS, will result in better efficiency. Efficiency will be measured
misconceptions and the confusions regarding the magnetic and the electric polarization. For instance, there is a misconception that “a magnetic field exerts a force on both the steady and the moving objects” (Fernandez and Wai-Yim 344), this is not the case always. The other misconception is that “magnets attract all metals.” This assumption is also false Polarization applies to both the electric charges and the magnetic charges. Not all metals are magnetic, different metals have a different orientation
In this experiment, we are able to study about magnetism and magnetic fields. Magnetism is very useful in our daily life. A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. In addition, magnetic field is a region which a magnetic material experiences a force as the result of the presence of a magnet or a current carrying conductor. Current carrying conductors also known as wire. As we know there have north pole and south pole of a
Over the third quarter of physical science we have discussed heat, energy, electricity and magnetism. I have decided to do my paper over these four topics. If you have any questions please hold them till the end. First let’s start with heat. We think of heat as to be warm but if you ever get the chance to ask a scientist he will tell you that science defines it as the flow of energy from a warm object to a cooler object. Like when you rub your hands together when you outside at a bomb fire and
transportation “Electrified transportation” is increasingly becoming more accepted as the norm rather than the exception. “Ultra capacitors” developed to run electric cars have greater energy density than traditional batteries. Technology that uses a “magnetic gradient” to develop permanent magnet-powered impacting, our transportation networks and how we use them. Electricity helps satisfy the intent and goal to reduce carbon emissions given off by fossil fuel-burning combustion engine vehicles. Mass transit
that we need to advance the potential capabilities of the magnet and fully understand how we can harness the magnet. In my research I looked at how a magnet works, the physics behind a magnet, the magnetic fields of Earth, why can’t magnets be used as energy, and magnets for pain relief benefits. Magnetic Field of Earth: During the times of the ancient Greeks, they discovered stones that had the capacity to attract metals such as iron which is believed to be iron that had been electrically magnetized