Magnetism

A magnet is an object that has a magnetic field. The word magnet comes from the Greek "magnítis líthos" (μαγνήτης λίθος), which means "magnesian stone". Magnesia is an area in Greece (Now Manisa, Turkey) where deposits of magnetite have been discovered since antiquity. Magnet - Introduction. In the modern sense, a magnet is any material that has a magnetic field. It can be in the form of a permanent magnet or an electromagnet. Permanent magnets do not rely upon outside in ...

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Magnet - Characteristics of magnetic materials

Read more here: » Magnet: Encyclopedia - Magnet

Magnetism: Encyclopedia - Magnetism In physics, magnetism is one of the phenomena by which materials exert an attractive or repulsive force on other materials. Magnetism - Magnetic materials. Some well known materials that exhibit easily detectable magnetic properties are iron, some steels, and the mineral lodestone; however, all materials are influenced to one degree or another by the presence of a magnetic field, although in most cases the influence is too small to detect without special equipment.

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Magnetism: Encyclopedia - Magnetization

Magnetization refers to the property of some materials to generate a magnetic field, either in the presence of an external magnetic field or spontaneously. Magnetization is not always homogeneous within a body, but rather a function of position. A magnetized body creates a demagnetization field that opposed the applied magnetic field. There are different types of magnetism: Magnetization - Diamagnetism. This is the most common magnetic behavior. The diamagnetic magnetization is proportional and oppo ...

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Magnetism: Encyclopedia II - Magnetism - Types of magnets

Magnetism - Electromagnets. Electromagnets are useful in cases where a magnet must be switched on or off; for instance, large cranes to lift junked automobiles. For the case of electric current moving through a wire, the resulting field is directed according to the "right hand rule." If the right hand is used as a model, and the thumb of the right hand points along the wire from positive towards the negative side ("conventional current", the reverse of the direction of actual movement of electrons), then t ...

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Magnetism: Encyclopedia - Ferrite magnet

Ferrites are ferromagnetic ceramic materials, compounds of iron, boron and barium or strontium or molybdenum. Ferrites have a high magnetic permeability, which allows them to store stronger magnetic fields than iron, and are known as ceramic magnets. They are the most common ordinary household magnets. The magnetic field B is about 0.35 tesla and the magnetic field strength H is about 30 to ...

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Ferrite magnet - Uses

Magnetism: Encyclopedia - Animal magnetism

Animal magnetism is both a synonym for mesmerism as well as the 18th century term for the supposed ethereal medium postulated by Franz Mesmer as a therapeutic agent. Its existence was examined by a French royal commission in 1784, and the commission concluded there was no evidence of its existence or efficacy of the animal magnetic fluid, and that its effects derived from either the imaginations of its subjects or charlatanry. The term is also occasionally employed in the context of Christian Science to describe unheeded mental influences, maliciou ...

Magnetism: Encyclopedia - Magnetic tape

Magnetic tape is a non-volatile storage medium consisting of a magnetic coating on a thin plastic strip. Nearly all recording tape is of this type, whether used for video with a videocassette recorder, audio storage (reel-to-reel tape, compact audio cassette, digital audio tape (DAT), digital linear tape (DLT) and other formats including 8-track cartridges) or general purpose digital data storage using a computer (specialized tape formats, as well as the above-mentioned compact audio cassette, used with home computers of the 1980s, and DAT, used fo ...

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Magnetism: Encyclopedia - Magnet therapy

Magnet therapy, or magnetic therapy, is a form of alternative medicine based on the claim that certain medical disorders can be effectively treated by exposure to magnetic fields. Some believe that magnetic fields emanating from permanent magnets placed close to the body can cause bones to heal faster, relieve pain, and perform other forms of healing to the body. It is most commonly recommended by practitioners as a cure for joint disorders and back problems. Critics charge that no verifiable evidence has been put forth that magnet therapy has any real benefits, and thus relegate it to the realm of ps ...

Magnetism: Encyclopedia - Earth's magnetic field

Earth's magnetic field (and the surface magnetic field) is approximately a magnetic dipole, with one pole near the geographic north pole and the other near the geographic south pole. An imaginary line joining the magnetic poles would be inclined by approximately 11.3° from the planet's axis of rotation. The cause of the field is probably explained by dynamo theory. The magnetic field extends several tens of thousands of kilometres into space as the magnetosphere. Earth's magnetic field - Magnetic poles. Including:

Magnetism: Encyclopedia - A Treatise on Electricity and Magnetism

A Treatise on Electriciy and Magnetism is an 1873 textbook on electromagnetism written by James Clerk Maxwell. According to the comprehension of the major trend for the fundamental equations of electromagnetic fields, electromagnetic potential is not explicitly involved. In his original book, the equations are compiled to two sets. The first set is The second set is See also. Maxwell's equations

Magnetism: Encyclopedia II - Magnet - Magnetic forces

Magnetized items interact with other items in very specific ways. Magnet - Magnets and other magnets. If a magnet is brought close enough to another magnet, their fields will begin to interact in the following ways: If each magnets north pole is brought together, the magnets will repel one another (like poles repel) If the north pole of one magnet is brought to the south pole of the other magnet (or vice versa), the magnets will attract one another (opposite poles attract) Magnet - M ...

Magnet, Magnet - Introduction, Magnet - Physical origin of magnetism, Magnet - Permanent magnets, Magnet - Electromagnets, Magnet - Characteristics of magnetic materials, Magnet - Permanent magnets and dipoles, Magnet - North/south pole designation and the Earth's magnetic field, Magnet - Common uses for magnets, Magnet - How to magnetize materials, Magnet - How to demagnetize materials, Magnet - Types of permanent magnets, Magnet - Magnetic forces, Magnet - Magnets and other magnets, Magnet - Magnets and ferromagnetic materials, Magnet - Magnets and diamagnetic materials, Magnet - Magnets and paramagnetic materials, Magnet - Calculating the magnetic force, Magnet - Online references, Magnet - Printed references, Magnet - External articles

Magnetism: New Age Spiritual Dictionary on Magnetism

magnetism

Natural attraction between the human body and One Infinity

(See also: Magnetism, Body Mind and Soul)

For more dictionary entries, see » Magnetism Dictionary

Magnetism: Spiritual Theosophical Dictionary on Magnetism

Magnetism. A Force in nature and in man. When it is the former, it is an agent which gives rise to the various phenomena of attraction, of polarity, etc. When the latter, it becomes "animal" magnetism, in contradistinction to cosmic, and terrestrial magnetism.

For more dictionary entries, see » Magnetism Dictionary

Magnetism: Spiritual - Theosophy Dictionary on Magnetism

Magnetism (from Greek lithos magnetes Magnesian stone, magnetic oxide of iron, found in Magnesia in Thessaly)

Scientifically, magnetic force is due to the movement of electric charges. While physics is concerned only with mineral magnetism, older thought saw the analogy between the various planes of nature and used magnetism in a wiser sense. The term animal magnetism is not so fanciful: The Secret Doctrine speaks of biune creative magnetism as acting in the constitution of man and animals in the form of the attraction of contraries as in sexual polarization; of there being seven forms of kosmic magnetism; of electricity and magnetism being manifestations of kundalini-sakti; of the world-soul as represented by a sevenfold cross whose arms are light, heat, magnetism, etc.

Magnetism, like other forces, is a manifestation of the activities of living beings. These forces are at the same time the physical counterparts, reflections, or phases of the universal cosmic electromagnetism, life-energy, or fohat. Magnetism, which is the alter ego of electricity, is that aspect or functioning of cosmic electromagnetism, mainly known to us as causing attraction and repulsion, and distinguished by bipolarity.

Both physical and physiological analogies suggest that terrestrial magnetism is inherent in some of the ultra-physical constituents of our globe, and that it must be powerfully influenced by the magnetism of other globes of the earth-chain, as well as by cosmic sources belonging to the solar system and even beyond. The position of the magnetic poles of the earth varies, and with this variation go variations in the magnetic inclination, declination, intensity, and distribution; which variations have cycles that are under study by scientists. What is called the north pole of a magnet should be called its south pole, since it is attracted and not repelled by the north pole of the earth; thus some writers call the north pole of a magnet the north-seeking pole.

"We know of no phenomenon in nature entirely unconnected with either magnetism or electricity . . . All the phenomena of earth currents, terrestrial magnetism and atmospheric electricity, are due to the fact that the earth is an electrified conductor, whose potential is ever changing owing to its rotation and its annual orbital motion, the successive cooling and heating of the air, the formation of clouds and rain, storms and winds, etc. . . . Science would be unwilling to admit that all these changes are due to akasic magnetism incessantly generating electric currents which tend to restore the disturbed equilibrium" (ML 160).

All electromagnetism is rooted in or takes its rise from the akasa, and the bipolarity of magnetism and electricity is simply a reproduction in our sphere -- and even in human beings when they manifest themselves -- of the fundamental bipolarity in cosmic structure inherent in the akasa, out of the womb of which the worlds are born. Magnetism might be considered the more subtle part of electricity, and electricity the grosser aspect of the fundamental force which is both. Both are fluids, emanations, from the akasa, and are really two aspects of the underlying fohat.

For more dictionary entries, see » Magnetism Dictionary

Magnetism: Encyclopedia II - Magnet - Characteristics of magnetic materials

Magnet - Permanent magnets and dipoles. All magnets are dipoles: that is, all magnets have a north and a south pole. The poles are not a pair of things on or inside the magnet. They are a concept used to discuss and describe magnets. In the image at the top of this page, the poles look like specific locations (because the highest surface intensity of the field occurs at the poles), ...

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Magnetism

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