magnetic levitation magnetic levitation‚ maglev or magnetic suspension is a method by which an object is suspended with no support other than magnetic field. Magnetic pressure is used to counteract the effects of the gravitationa and any other accelerations. Earnshaw’s theorem proves that using only ferromagnetic or paramagnetic materials it is impossible to stably levitate against gravity‚ however‚ servomechanisms‚ the use of di magnetic materials‚ superconduction‚ or systems involving eddy currents
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Oxides with a perovskite structure yield many commercial ferroelectrics (materials that possess a net macroscopic polarization switchable under external electric field). The structure of these oxides‚ having a general formula ABO3‚ can be represented as a network of corner-sharing oxygen octahedra with higher-charge cations B located inside these octahedra and lower-charge cations A occupying the cavities between the octahedra. Typically the spontaneous polarization originates from the concerted
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PHYS 2102 Final Exam Fall 2008 Name :________________________ Student # : _________________________ Section (circle one): 001 (Dr. Leilabady) 002 (Dr. Astratov) 092 (Dr. Aktas) You have 2 ½ hours to complete your answers There are 12 questions‚ 10 points each Exam graded out of 100 points (i.e. there is up to 20% bonus opportunity) This is a closed book exam. I understand I am not to use any notes or information other than on this exam sheet. I may use a pocket calculator
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Foreign Study According to Tod Caldwell a student of Florida State University College of Arts and Science has a research about the “Nuclear Magnetic Resonance Studies of Field Effects on Single Crystal Smb6 conclude that The low temperature anomaly of SmB6 appears to be an intrinsic characteristic of the system both from the NMR data and previous bulk measurements. Recent models have made use of excitonic states but have emphasized either the charge or spin characteristic of the gap. According to
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The Gauss Rifle: A Magnetic Linear Accelerator Macalino‚ D. M. D. Magpantay‚ J. M. Recto‚ I. J. Reyes‚ R. Francisco‚ P. V. 4 – 5 Zatti IDT 4 In partial fulfilment for the requirement in Physics Don Bosco Technical Institute – Makati SY 2011-2012 Ms. April J. Cruz Research Adviser Chapter I – Introduction I. Background of the Study It was either the Chinese or the Greeks who discovered
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Magnetic Properties of Solids Magnetic Properties Magnetic (with unpaired electron) Materials Non-magnetic or diamagnetic (electrons all paired up) Paramagnetic Ferromagnetic Antiferromagnetic Ferrimagnetic Magnetic Behavior B = μH B = μ0H + μ0M Induction generated Induction generated by the field by the sample B: magnetic flux density μ: permittivity (m0: free space) H: magnetic field M: Magnetization χ = M/H χ: magnetic susceptibility B = μ0H + μ0Hχ B = μ0H (1 + χ) = μH
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Common uses of magnets Hard disks record data on a thin magnetic coating. • Magnetic recording media: VHS tapes contain a reel of magnetic tape. The information that makes up the video and sound is encoded on the magnetic coating on the tape. Common audio cassettes also rely on magnetic tape. Similarly‚ in computers‚ floppy disks and hard disks record data on a thin magnetic coating. • Credit‚ debit‚ and ATM cards: All of these cards have a magnetic strip on one side. This strip encodes
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Investigatory Projects in Physics | Repulsorlifts as a Method of Stable Magnetic Levitation | Repulsorlifts were used in the study to find out if they can be used to replace the wheels of a conventional car. It was hypothesized that it will be able to lift a car using magnetic repulsion forces. The different magnets were tested individually with the usual tests for magnetic strength‚ size‚ and temperature increase‚ which were done in the preliminary testing. The prototype road and car were
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Ampere’s Law Jessica Warfield Partner: Rachel Beckner TA: Joel Mazer March 15‚ 2012 Conclusion: This experiment clearly demonstrated how Ampere’s Law relates the magnetic field to the current using the relationships stated in the formula B= μ0I2πr. This relationship allowed to the experiment to calculate the value of permeability of free space in order to verify the relationship that is outlined in Ampere’s Law. This lab also allowed us to measure magnetic field strength as a function of
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San Francisco‚ January 22‚ 2014 - The global market for permanent magnets is expected to reach USD 31.18 billion by 2020‚ according to a new study by Grand View Research‚ Inc. Growth of global automobile industry is expected to be a key driving factor for permanent magnets market over the forecast period. Permanent magnets are widely used for numerous applications in automobile industry. Various components such as motors‚ alternators and gearbox require permanent magnets for their mechanism. Grand
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