electricity and magnetism? A. Energy B. Magnet transport system and Transmission lines. C. Magnetic repulsion and attraction D. Magnetic lines of induction 2. Every magnet‚ whatever its size or shape‚ has two poles. A. West and East B. West and North C .North and South D. South and East 3. The N-pole of a suspended magnet‚ like a compass needle is _____. A. Always point to the north magnet pole of the earth B. Point to the west C. The magnet point is always pointing the South D. The South
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A transformer is a static machine used for transforming power from one circuit to another without changing frequency. This is very basic definition of transformer. History of Transformer The History of transformer commenced in the year of 1880. In the year of 1950 400KV electrical power transformer first introduced in high voltage electrical power system. In the early 1970s unit rating as large as 1100MVA were produced and 800KV and even higher KV class transformers were manufactured in year
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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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Electricity and magnetism run nearly everything we plug in or turn on. Although it’s something we take for granted‚ it has taken hundreds of years of experimentation and research to reach the point where we flick a switch and the lights go on. Ancient Greeks knew rubbing amber generated static electricity‚ but they didn’t know why. The Greek word for amber is elektron. People knew about electricity for a long time. Ancient Greeks noticed that if they rubbed a piece of amber‚ feathers would
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PHYSICS HIGHER SECONDARY SECOND YEAR VOLUME - I Revised based on the recommendation of the Textbook Development Committee Untouchability is a sin Untouchability is a crime Untouchability is inhuman TAMILNADU TEXTBOOK CORPORATION COLLEGE ROAD‚ CHENNAI - 600 006 c Government of Tamilnadu First edition - 2005 Revised edition - 2007 Dr. S. GUNASEKARAN Reader Post Graduate and Research Department of Physics Pachaiyappa’s College‚ Chennai - 600 030 CHAIRPERSON Reviewers P SARVAJANA
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J. Perreault‚ Vahe Caliskan. Automotive Power Generation and Control. Transactions on power electronics‚ vol. 19‚ no. 3‚ may 2004. 4. John G. Kassakian. AUTOMOTIVE ELECTRICAL SYSTEMS -THE POWER ELECTRONICS MARKET OF THE FUTURE. Laboratory for Electromagnetic and Electronic Systems. The Massachusetts Institute of Technology‚ Room 10-172‚ 77 Mass Avenue Cambridge‚ MA 02139. 5. PHYS. ORG. “Keeping electric vehicle batteries cool”‚ Jul 03‚ 2012. 6. Peter Mock‚ Dirk Hülsebusch‚ Jörg Ungethüm‚ Stephan
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discoveries‚ the principle of electromagnetic induction by using the "induction ring". The electricity was generated by means of electromagnetic effect. This was the first version of an electric transformer. He further discovered that magneto electric induction produced electric current on a continuous basis. Through a sliding contact to a disc made of copper‚ Faraday attached two wires. He rotated the disc between the two poles (north and south) of a horse shoe magnet and found that he obtained a
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Bibliography [1] http://www.gcsescience.com/pme5.htm [2] http://www.s-cool.co.uk/a-level/physics/magnetic-fields/revise-it/effect-of-ferrous-cores-and-the-relationship-between-curre [3] http://www.bbc.co.uk/bitesize/ks3/science/energy_electricity_forces/magnets_electric_effects/revision/4/ [4] http://www.howmagnetswork.com/Electromagnetism.html [5] http://www.wisegeek.com/what-is-a-solenoid-door-lock.htm [6] http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/solenoid.html The shape
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demonstrated correlation between the charge and mass of an electron and the behavior of magnetic fields. The lab was divided into four parts. The first three parts were conducted with a compass that was used to locate the magnetic field lines around a bar magnet‚ a solenoid and then a pair of Helmholtz coils. As a result of these trials‚ our observations found evidence that magnetic field lines go from a north magnetic pole to a south magnetic pole. These results were seen in all three magnetic devices
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generated very high voltages and low currents. They operated by using moving electrically charged belts‚ plates and disks to carry charge to a high potential electrode. The charge was generated using either of two mechanisms: * Electrostatic induction * The triboelectric effect‚ where the contact between two insulators leaves them charged. Because of their inefficiency and the difficulty of insulating machines producing very high voltages‚ electrostatic generators had low power ratings and
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