Chapter 9 Review Questions 1. What is magnetism? 2. Torque is ________. 3. A magnetic field is _________. 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. 5. How is an electromagnet produced? 6. Which of the following produces the best electromagnet? 7. Unlike poles of a magnet _________each other and like poles_________ each other. 8. What part does polarity play in the operation of
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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 it and began researching and designing. The motion of the Maglev train is based purely on magnetism and magnetic fields. This magnetic field is produced by using high-powered electromagnets. By using magnetic fields‚ the Maglev train can be levitated above its track‚ or guide way‚ and propelled forward. Wheels and moving parts are eliminated on
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Permanent Magnet Moving Coil: Principle of Working When a current carrying conductor is placed in a magnetic field‚ it experiences a force and tends to move in the direction as per Fleming’s left hand rule. Fleming left hand rule: If the first and the second finger and the thumb of the left hand are held so that they are at right angle to each other‚ then the thumb shows the direction of the force on the conductor‚ the first finger points towards the direction of the magnetic field and the second
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ANNUAL EXAMINATION – 2010 PHYSICS; CLASS - VII NAME: _________________________ Date: 26 – 02 – 10 (1st sit) Roll. No. ___________ F.M: 75 SECTION A (Answer all questions) QUESTION - 1. Fill in the blanks. (5) i) Making one complete round of a circular path of radius r‚ the net displacement is ___________________. ii) If a body is dropped from a certain height‚ its velocity increases due to __________. iii) The force of friction is always equal
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Have you ever wondered what the inventions of medieval times were like? How people did things such as grinding grain? Well‚ now you will know what it was like. Medieval innovations are fascinating for three reasons. We know about how they did everyday things‚ what science was like‚ and how they affect our scientific progress. Windmills are one type of invention. Windmills were brought to Europe in the 12th century by the crusaders. The sails (the things that turned in the wind) were mounted on a
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Periodic Table Rockwell Hardness Test Machine Fundamentals Of Materials Science for Technologists textbook PROCEDURE Use the following criteria to sort the samples and match them with the listed metals: Color Magnetism Weight/Volume Hardness Chemistry Analysis Experience DATA H E A J
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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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and mirroring in graphene Mikito Koshino‚ Yasunori Arimura‚ and Tsuneya Ando arXiv:0903.1690v2 [cond-mat.mes-hall] 17 Jun 2009 Department of Physics‚ Tokyo Institute of Technology‚ Tokyo 152-8551‚ Japan (Dated: June 17‚ 2009) The orbital magnetism in spatially varying magnetic fields is studied in monolayer graphene within the effective mass approximation. We find that‚ unlike the conventional two-dimensional electron system‚ graphene with small Fermi wave number kF works as a magnetic shield
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1. INTRODUCTION Generally when most people think about electronics‚ they may initially think of products such as cell phones‚ radios‚ laptop computers‚ etc. others‚ having some engineering background‚ may think of resistors‚ capacitors‚ etc. which are the basic components necessary for electronics to function. Such basic components are fairly limited in number and each having their own characteristic function. Memristor theory was formulated and named by Leon Chua in a 1971 paper. Chua
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Journal of Magnetism and Magnetic Materials 65 (1987) 71-75 North-Holland‚ Amsterdam 71 LOW-FIELD MAGNETIC H Y S T E R E S I S IN IRON‚ COBALT‚ NICKEL AND S T E E L G.H.J. W A N T E N A A R ‚ S.J. CAMPBELL‚ D.H. C H A P L I N and G.V.H. WILSON Department of Physics *‚ University College‚ University of New South Wales‚ A ustrafian Defence Force Academy‚ Campbell A CT 2600‚ A ustrafia Received 15 August 1986 Spheroidal samples of high purity iron‚ cobalt and nickel and carbon steel have
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