Procedure: 1. The compass was placed on the lab table with no magnets nearby to identify what direction was north relative to the classroom. 2. On the ends of the variable gap magnet there were two small magnetic disks. One arm of the magnet was unscrewed and removed from its housing. A meter stick was placed on the and the arm was on its side parallel to the meter stick. The Gauss-Tesla meter was used to measure the field strength of the magnet. The probe attached to the meter was perpendicular to the
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and demagnetizing. All will be explained in my science project. More importantly‚ to discover through experimentation that the secret behind magnetism could be its power! Let’s start by defining an electromagnet. An electromagnet is a temporary magnet formed when electric current flows through a wire or a conductor. Most electromagnets consist of wire wound around an iron core. This core is made from soft iron that loses its magnetism quickly when the electric current stops flowing through the
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Electric Motors and Drives This Page Intentionally Left Blank Electric Motors and Drives Fundamentals‚ Types and Applications Third edition Austin Hughes Senior Fellow‚ School of Electronic and Electrical Engineering‚ University of Leeds AMSTERDAM • BOSTON • HEIDELBERG • LONDON • NEW YORK • OXFORD PARIS • SAN DIEGO • SAN FRANCISCO • SINGAPORE • SYDNEY • TOKYO Newnes is an imprint of Elsevier Newnes is an imprint of Elsevier Linacre House‚ Jordan Hill‚ Oxford OX2 8DP 30 Corporate
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produces by turning. 3. A magnetic field is D. All the above. 4. True or False: A permanent magnet is a piece of material that has been magnetized and can hold its magnetic strength for a reasonable length of time. True. 5. How is an electromagnet produced? Through electricity. 6. Which of the following produces the best electromagnet? B. soft iron 7. Unlike poles of a magnet repel each other and like poles attract each other. 8. What part does polarity play in the operation
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Motor: The principle of Working of stepper motor is Electro-Magnetism. It constructs of a rotor that is of permanent magnet and a stator that is of electromagnets The following figure shows the construction of a practical stepper motor: Now when we gives supply to stator’s winding. There will be a magnetic field developed in the stator. Now rotor of motor that is made up of permanent magnet‚ will try to move with the revolving magnetic field of stator. This is the basic principle of working of stepper
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simple‚ a DC motorrequires two magnets of opposite polarity and an electric coil‚ which acts as an electromagnet. The repellent and attractive electromagnetic forces of the magnets provide the torque that causes the DC motor to turn. If you’ve ever played with magnets‚ you know that they are polarized‚ with a positive and a negative side. The attraction between opposite poles and the repulsion of similar poles can easily be felt‚ even with relatively weak magnets. A DC motor uses these properties
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angent Principle at right earth’s along Ecompass calculate A compa plane ve mounte base wh the coils on level Theory: E‐W and the coil udy.in Magnet Gal t galvanome e: Based on angle to eac horizontal c ‐W direction s box is kept ed. ass box mou ertical. A non d from one hile the othe s can be rota ling screws. Since the di d magnetic f should be pl IEMS lvanometer eter: the principle h other in w component o n is produce t at the cent unted on the n conducting
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ferrite magnetic materials‚ rare earth magnetic materials‚ and others. In 2012‚ the number of flexible ferrite magnet enterprises approximated 200 in China‚ roughly 150 of which had a capacity over 500t/a‚ about 60 had a capacity over 1‚000t/a. Enterprises such as Hengdian Group DMEGC Magnetics and TDG Holding had a capacity over 10‚000t/a. In 2012‚ China’s output of ferrite permanent magnet totaled 630‚000 tons‚ an increase of 5% YOY. The growth rate decreased by 6 percentage points over a year before
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1. Go to http://phet.colorado.edu 2. Click on electricity and magnetism sims. 3. Select the simulation “Magnets and Electromagnets.” It is at this link http://phet.colorado.edu/new/simulations/sims.php?sim=Magnets_and_Electromagnets 4. Move the compass slowly along a semicircular path above the bar magnet until you’ve put it on the opposite side of the bar magnet. Describe what happens to the compass needle. 5. What do you suppose the compass needles drawn all over the screen
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MAGNETIC LEVITATION AND TRAINS BY: MANISH KUMAR 2K12/EE/075 Delhi Technological University INTRODUCTION MAGLEV = MAGNETIC + LEVITATION Magnetic means “based on magnets” Levitation means “to rise and float in air” Maglev is a method of propulsion that uses magnetic levitation to propel vehicles with magnets rather than with wheels that the conventional trains use. Magnetic levitation is the use of magnetic fields to levitate a (usually) metallic object. Manipulating magnetic fields and
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