Electromagnetism and Magnetic Field - 1438 Words

Electromagnetism From Wikipedia, the free encyclopedia Jump to: navigation, search Electromagnetism is the physics of the electromagnetic field, a field that exerts a force on particles with the property of electric charge and is reciprocally affected by the presence and motion of such particles. A changing magnetic field produces an electric field (this is the phenomenon of electromagnetic induction, the basis of operation for electrical generators, induction motors, and transformers). Similarly, a changing electric field generates a magnetic field. The magnetic field is produced by the motion of electric charges, i.e., electric current. The magnetic field causes the magnetic force associated with magnets. The theoretical†¦show more content†¦All the forces involved in interactions between atoms can be traced to the electromagnetic force acting on the electrically charged protons and electrons inside the atoms. This includes the forces we experience in pushing or pulling or dinary material objects, which come from the intermolecular forces between the individual molecules in our bodies and those in the objects. It also includes all forms of chemical phenomena, which arise from interactions between electron orbitals. {text:bookmark-start} {text:bookmark-end} [edit] Classical electrodynamics Main article: Classical electrodynamics The scientist William Gilbert proposed, in his De Magnete (1600), that electricity and magnetism, while both capable of causing attraction and repulsion of objects, were distinct effects. Mariners had noticed that lightning strikes had the ability to disturb a compass needle, but the link between lightning and electricity was not confirmed until Benjamin Franklins proposed experiments in 1752. One of the first to discover and publish a link between man-made electric current and magnetism was Romagnosi, who in 1802 noticed that connecting a wire across a voltaic pile deflected a nearby compass needle. However, the effect did not become widely known until 1820, when Ørsted performed a similar experiment. Ørsteds work influenced Ampà ¨re to produce aShow MoreRelatedElectricity and Magnetism1396 Words   |  6 PagesHuman civilisation has dealt with magnetism for millennia, earliest evidence dating as far back as 1000 BC where the ancient Chinese civilisation discovered a naturally occurring magnetic ore, magnetite. This ore, commonly known as lodestone was used by the ancient Chinese as a geomagnetic compass, however, no one really knew what magnetism was at the time. For centuries on, we have had basic knowledge regarding electricity based upon static electricity found from rubbing amber and fur. However,Read MoreElectromagnetism Studies the Relationship Between Electricy and Magnetism846 Words   |  4 PagesElectromagnetism is the branch of physics that studies the relationship between electricity and magnetism. Electromagnets are magnets that uses an electric current to attract metal. Electromag nets have many parts that make up them and are used in many things. Electromagnetism has a history that dates back over 200 years. The year 1700 was the first demonstration of an electromagnet, yet scientists didnt know much about electromagnetism (Bellis 1). In 1820, scientists had just started to get deepRead MoreThe Physics Of Magnetic Field867 Words   |  4 Pagesthrough it, is placed in a magnetic field a force is placed on the wire: this is the motor principle and this is the principle behind the loud speaker. Hello, My name is Michael Trevorrow and you will be learning about the loud speaker and electromagnetism. But first, if you want to understand the loud speaker you have to understand electromagnetism. Well electromagnetism is simply ‘the phenomenon of the interaction of electric currents or fields and magnetic fields’. This will become clearerRead MoreThe World Is A State Of Crisis1552 Words   |  7 Pagescurrently trying to pass a law that will disallow Tesla vehicles from being sold in the state. This is just one brief example of a current advancement in the field and an issue that it faces. In this paper we will cover two other systems that are on the forefront of this progression: FlyKly and MagLev. We will go into how each uses electromagnetism to accelerate and decelerate and look at the advantages and possible setbacks of the two During research I came across two emerging technologies that turnRead More Secret of Magnetism Essay1217 Words   |  5 Pagesnbsp;nbsp;nbsp;nbsp;nbsp;Electromagnetism is the branch of physics that studies the relationship between electricity and magnetism. Electromagnetism is based on the fact that (1) an electric current or a charging electric field produces a magnetic field or (2) a charging magnetic field produces an electric field. nbsp;nbsp;nbsp;nbsp;nbsp;In 1820, the Danish scientist Hans Oersted discovered that a conductor carrying an electric current is surrounded by a magnetic field. When he brought a magnetizedRead MoreAre Electromagnetic Field Melt Metal Screw Nuts ( Zinc, Brass, And Stainless Steel1636 Words   |  7 PagesResearch Question and Engineering Goal: Can an electromagnetic field melt metal screw nuts (zinc, brass, and stainless steel)? Our engineering goal is to create a device that will form an electromagnetic field that has the ability to melt an assortment of metals. It might look like magic; however, it is just science! Background: Electromagnetic Field: (noun) a field that is made up of associated electric and magnetic components that result from the motion of an electric charge. It also possessesRead MoreMagnets : Magneto s Revenge1747 Words   |  7 PagesRevenge Magnetism Magnetism is a class of physical phenomena mediated by magnetic fields. All materials are in some way influenced by a magnetic field. The force between any two charged particles depends on the magnitude of the charge on each and the distance that separates them. In addition to electrical forces, there is a force due to the motion of the charged particles known as the magnetic force. Magnetic Poles Magnetic forces exert on one another similarly to electrical forces in that theyRead MoreInvestigation Of A Coil Gun2164 Words   |  9 Pagesfrom Carl Friedrich Gauss, who formulated the mathematical proofs of the electromagnetic effect used by Gauss cannons. The Gauss cannons are often called wrongly railguns from various sources, and while they are similar in general concept (ie, a magnetic weapon), differ in operation, since a railgun accelerates the missiles on two rails parallel conductors. The Gauss cannons are in substance identical to the projector mass, albeit on a smaller scale. Kristian Birkeland is commonly considered theRead MoreString Theory925 Words   |  4 PagesString theory is defined by Merriam-Webster as, A physical theory in which one-dimensional loops travel through space and also merge and lyse as time elapses. This is in contrast to ordinary quantum field theory, which predicts point particles that emit and absorb each other. String theory is a candidate for a Theory of Everything. String theory would solve the long fight between Einsteins theory of relativity and Quantum Physics. String theory proclaims that everything in our universe, fromRead MoreEssay about Concepts, Theories and Unknowns Aspects of Magnetism1684 Words   |  7 Pagesit will probably be easily understood, but none the less intriguing. Magnets have intrigued people for a long time; they were discovered long ago. Certain rocks and ores of iron called lodestones were found. These lodestones which were naturally magnetic rocks made of the mineral magnetite, were so mysterious to people that they caused many superstitions about themselves. One superstition was the belief that there were enormous lodestones rising out of the sea. Many sailors would not venture too