eloectromagnism is a rare diseaase of the mind. seriously, it's the combination of fundamental forces called electricity and magnetism. They show themselves in the form of light. The other form of this property is called animalmagnetism which manifests itself in the form of people who always get laid.
2006-07-14 09:14:07
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answer #1
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answered by Bogey 4
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Electromagnetism is magnetic attraction produced by the use of electricity. To produce it, a wire is wrapped around a piece of iron, then electricity (direct current, not alternating) is put in the wire. (Kids! Do not try this at home!!) The piece of iron will then become magnetic and attract other pieces of iron.
This principle is used in the operation of such things as doorbells, electrically locked doors, and the big magnetic cranes at junkyards.
2006-07-10 02:41:43
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answer #2
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answered by sandislandtim 6
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It is often convenient to understand the electromagnetic field in terms of two separate fields: the electric field and the magnetic field. A non-zero electric field is produced by the presence of electrically charged particles, and gives rise to the electric force; this is the force that causes static electricity and drives the flow of electric charge (electric current) in electrical conductors. The magnetic field, on the other hand, can be produced by the motion of electric charges, or electric current, and gives rise to the magnetic force associated with magnets.
The term "electromagnetism" comes from the individual component electrical and magnetic forces involved. A changing magnetic field produces an electric field (this is the phenomenon of electromagnetic induction, which underlies the operation of electrical generators, induction motors, and transformers). Similarly, a changing electric field generates a magnetic field.
Because of this interdependence of the electric and magnetic fields, it makes sense to consider them as a single, theoretically coherent entity — the electromagnetic field. This unification, which was completed by James Clerk Maxwell, is one of the triumphs of 19th century physics. It had far-reaching consequences, one of which was the elucidation of the nature of light: as it turns out, what is thought of as "light" is actually a propagating oscillatory disturbance in the electromagnetic field, i.e., an electromagnetic wave. Different frequencies of oscillation give rise to the different forms of electromagnetic radiation, from radio waves at the lowest frequencies, to visible light at intermediate frequencies, to gamma rays at the highest frequencies.
The theoretical implications of electromagnetism led to the development of special relativity by Albert Einstein in 1905.
2006-07-10 02:38:25
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answer #3
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answered by TrippleThreat 3
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