attraction is used‚ it is known as magnetic suspension. If magnetic repulsion is used‚ it is known as magnetic levitation. In the past‚ magnetic levitation was attempted by using permanent magnets. Earnshaw’s theorem however‚ proves that this is mathematically impossible. There exists no arrangement of static magnets of charges that can stably levitate an object. There are however means of circumventing this theorem by altering its basic assumptions. The following conditions are exceptions to Earnshaw’s
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system that allows each vehicle to warp around a T-shape guide way. Electrodynamics systems are systems that utilize magnetic repulsion rather than attraction. The similarities between these two Mag-lev vehicle systems are that they both utilize magnets. However the difference between them is that one looses all their resistance and other still has it. Although the similarities between these two systems is that they have major problems that are affecting the systems‚ for example the EMS requires
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transportation. Perhaps‚ in the future‚ electricity could be less expensive and more efficient by developing new methods of production‚ such as the use of nuclear energy to generate electricity. Indeed‚ electromagnetism proves that electricity and magnets are not merely for having lights and air conditioning‚ or even sticking notes to the refrigerator. Electromagnetism is an essential concept behind most of today’s modern
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physical concepts used in a Magnetic Resonance Imaging‚ also known as MRI‚ machine. There are many physical concepts used when an MRI is taken of the body‚ such as; radio waves‚ resonance and pulse sequences‚ magnetic fields being produced and lastly‚ magnets. Radio waves much stronger than the magnetic field of the Earth are sent through the body which causes the nuclei in the body to move to a different position. When the nuclei move back to the place they originated from‚ they send back radio waves
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diaphragm vibrates back and forth‚ and the attached coil moves along with it. Additionally‚ magnet is attached with coils on a cardboard. When the coil alternately approaches and move back from the magnet‚ the flux through the coil changes. As a result of this‚ an ac emf is induced in the coil. Next‚ this electrical signal is sent to an amplifier and to the speakers respectively. In a moving-magnet microphone‚ the magnet is attached to the diaphragm and moves relative to a stationary coil. The handmade
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------------------------------------------------- Magnetism From Wikipedia‚ the free encyclopedia This article is about magnetic materials. For information about objects and devices that produce a magnetic field‚ see magnet. For fields that magnets and currents produce‚ see magnetic field. For other uses of "Magnetism"‚ see Magnetism (disambiguation). Magnetic leads here. For other uses of magnetic‚ see Magnetic (disambiguation) A magnetic quadrupole Electromagnetism | | * Electricity
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• 52 one-inch square magnets with north and south poles on the faces‚ rather than ends (found at hobby shops) • One strip of 1/4-inch thick foam core‚ 24 inches long by 4 inches wide • Two strips of 1/4-inch thick foam core‚ 24 inches long by 2.5 inches wide • One strip of 1/4-inch thick foam core‚ 6 inches long by 3.75 inches wide • Hot melt glue and glue gun • Masking tape Directions:- 1.Cut a strip of masking tape 24 inches long. Press a line of 24 magnets onto the tape‚ north sides
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the U-magnets? The distribution of magnetic flux lines when the iron ring is placed in between the magnets‚ the iron ring is included in the distribution of flux lines. Instead of connecting to the other pole‚ the ring affects its distribution and some of it is attracted to the iron ring. 2. How does changing the current affect the magnetic force on a wire suspended in a magnetic field? As the current rises‚ the magnetic force is pushing the magnet away from the current‚ or pulls the magnet either
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Magnets. How do they work? How does the number of coils affect electromagnetism? Hypothesis: When there is a flow of moving electrons‚ a magnetic field is created. We use the equation F = NIlB (Force = Number of coils x Current x Length of Wire x Magnetic Field Strength) to work out the magnetic force produced in a wire when there is an electric current present. Using this equation we can see that increasing the length of the wire (amount of coils) gives a larger force. So increasing the amount
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.INTRODUCTION Magnetic levitation is the latest in transportation technology and has been the interest of many countries around the world. The idea has been around since 1904 when Robert Goddard‚ an American Rocket scientist‚ created a theory that trains could be lifted off the tracks by the use of electromagnetic rails. Many assumptions and ideas were brought about throughout the following years‚ but it was not until the 1970’s that Japan and Germany showed interest in
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