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Physics behind magnetism
Applications of magnetism essay
Applications of magnetism essay
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Magnetism (What is it and how does it work?)
Give your kid a little magnet and let them go through the house and see how many things and what type of things they can pick up, using only the magnet.
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Let's start at the beginning...
What is magnetism?
Magnetism is a force that is created by electric current that is most likely caused by the moving electrons.
What is magnets?
A magnet has two end that we call poles, a north pole/north-seeking pole or a south pole/south-seeking pole. The north pole of a magnet attracts the south pole of a second magnet, but the north-pole of one magnet repels the north-pole.
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A magnet creates an invisible area round itself, magnetism, we call it an magnetic field. The
In the twentieth century the medical field has seen many changes. One way that hospitals and nursing specifically has changed and implemented the changes is by pursuing accreditations, awards, and recognitions. The purpose of this paper is to understand Magnet Status and the change required by hospitals to achieve it.
Armature - Sometimes called a rotor. This is the part that spins. The armature can be either a permanent magnet or an electromagnet.
Magnetic fields are frequently compared to gravitational fields. Gravitational fields cause a curvature of space-time. That curvature of space-time provides a mechanism for the gravitational attraction between masses. A magnet also causes a curvature of space-time. In fact a magnet can cause space-time curvature in several distinct ways.
and a coil. The changing flux induces an emf, which produces a current in the
a magnet, that may be in the open or inside any device, such as a speaker phone
As almost any child knows, magnets have the ability to attract and repel other magnets. This knowledge is now being utilized in separate projects in Germany and Japan to propel and levitate a new and innovative type of train, the magnetic lift train.
Electromagnetism is the study of the relationships between magnetism, and electricity. It was found by Hans Oersted, that when an electric current flows in a wire, the current creates a magnetic force around this wire. It is also known that a solenoid produces a considerably large amount of magnetic force when a current flows through it (diagram 1.1 ). By using a solenoid and some small, light rings of copper and aluminum, it is said that the ring when placed over the solenoid when current is flowing will 'jump' up and sometimes levitate if the force of the magnetic field equals that of the earth's gravitational force.
A magnet, defined in the Merriam-Webster dictionary, is classified as “a piece of iron (or an ore, alloy, or other material) that has its component atoms so ordered that the material exhibits properties of magnetism, such as attracting other iron-containing objects or aligning itself in an external magnetic field” (insert citation for google). This definition is saying that a magnet contains a magnetic field and it can attract other objects with like properties of that magnet so that they match up with one another creating a constant hold. Magnets were discovered over 2,000 years ago when the Greeks found a mineral that joined with like objects made of iron. This mineral was discovered in a city called Magnesia, so the Greeks named it magnetite (insert saxon citation).
metal situate in the same fassion also creating a magnet. Now that we know the
It’s the magnetic field that extends from the earth’s interior to where it meets the solaria stream of charged particles emanating from the sun. The magnetic field resembles the field of a large bar magnet near its center or that due to a uniformly magnetized sphere. Its origin is thought to be generated deep down in the earth’s core.
A magnet is an object ( typically a material with metallic properties ( ferrous ) that emits a magnetic field and attracts other iron objects or aligns itself with another’s external magnetic field, produced by the alignment of its internal component atoms. This is one of the worlds biggest phenomenons, we know how they work, but it is confusing to understand the invisible power of them. Did you know that the earth is a giant magnet!
Magnets are stones that produce magnetic fields. The magnetic field is invisible, but is responsible for the most noticeable aspect of a magnet: the attraction of a metal object or the repulsion of another magnet. Magnets are used in common everyday household items: credit cards, TVs, speakers, motors, and compasses. A magnets strength is measured by its magnetic moment. (“Magnetism”)
Electric currents produce magnetic fields, they can be as small as macroscopic currents in wires, or microscopic currents in atomic orbits caused by electrons. The magnetic field B is described in terms of force on a moving charge in the Lorentz force law. The relationship of magnetic field and charges leads to many practical applications. Magnetic field sources are dipolar in nature, with a north and south magnetic pole. The magnetic field SI unit is the Tesla, it can be seen in the magnetic part of the Lorentz force law F magnetic = qvB composed of (Newton x second)/(Coulomb x meter). The smaller magnetic field unit is the
When a ferromagnetic material is magnetized in one direction, it will not relax back to zero magnetization when the imposed magnetizing field is removed. It must be driven back to zero by a field in the opposite direction. If an alternating magnetic field is applied to the material, its magnetization will trace out a loop called a hysteresis loop. The lack of retraceability of the magnetization curve is the property called hysteresis and it is related to the existence of magnetic domains in the material.
The principles behind the operation of an electric motor are known as Ampere’s law and Faraday's law. The first states that when an electrical conductor is placed in a magnetic field, experience a