induced there are two types of tachogenerators: 1. DC tachogenerator 2. AC tachogenerator PRINCIPLE It operates on the principle of Faraday’s Laws of Electromagnetic induction . It states that whenever there is a relative motion between the magnetic field and a conductor ‚ then the voltage is generated in that conductor. Characteristic requirements of tachogenerator: Accuracy: The input to the tachogenerator is
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1 hour IB DIPLOMA PROGRAMME PROGRAMME DU DIPLÔME DU BI PROGRAMA DEL DIPLOMA DEL BI N07/4/PHYSI/HPM/ENG/TZ0/XX+ 88076501 Physics higher level PaPer 1 Thursday 8 November 2007 (afternoon) INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 8807-6501 21 pages © IBO 2007 –2– 1. Which
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AS Level Physics: Terms & Definitions:- Measurement Random errors are errors of measurements that result in a scatter of readings about a mean value. Systematic errors are errors of measurement which occur according to some fixed patterns such that they consistently give out an over-estimation or under-estimation of the true value. Accuracy is a measure of how close the results of an experiment agree with the true value. Precision is a measure of how close the results of an experiment
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a) Write brief notes on the Hall effect. Show on a diagram the polarity of the Hall Voltage‚ together with a given current and magnetic field direction‚ assuming the charge carriers to be conduction electrons. [5] b) Define electric dipole and the electric dipole moment. Write down an expression‚ in vector form‚ and show graphically the electric field intensity at point P on the normal to the axis of the dipole. [5] 2. a) What is the potential difference between
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theorem 1.2.2. Potential fields 1.2.3. Faraday’s law 1.3. Electromagnetic theory in a moving frame 1.4. Ohm’s law‚ induction equation and boundary conditions 1.4.1. Lorentz force 1.4.2. Induction equation 1.4.3. Boundary conditions 1.5. Nature of the induction equation: Magnetic Reynolds number 1.6. The kinematic dynamo problem 1.7. Vector potential‚ Toroidal and Poloidal decomposition. 1.7.1. Vector Potential 1.7.2. Toroidal-Poloidal decomposition 1.7.3. Axisymmetric field decomposition 1.7
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amount of noise. Such traits were the reason maglev trains should be competitive with airlines. Then again the extremely great prices and economic cost (In short term) did not let much creation around the world and limited it to one line in Shanghai. (Magnetic levitation train - Definition) Figure 2 (Electromagnetic Suspension) Figure 2 (Electromagnetic Suspension) Maglev trains mostly work on the different techniques and main principles of physics and magnetism. The first would be
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work is done to move a charge of 1 coulomb from one point to another. 1 Potential difference = = Work done (W) Charg e transferred (Q) 100 J =5 V 20C 1 7. S N 1 Properties : (i) In air‚ field lines start from N-Pole and end at S-Pole. (ii) 8. (i) (ii) No two magnetic field lines can ever intersect at any one point. Substance reduced = Fe2O3 Substance oxidized = CO Substance reduced = MnO2 Substance oxidized = Al (iii) Substance reduced = SO2 Substance oxidized = H2S ½×2=1 ½ ½
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is a widely applied and low-cost inspection method used to locate surface-breaking defects in all non-porous materials (metals‚ plastics‚ or ceramics). Penetrant may be applied to all non-ferrous materials‚ but for inspection of ferrous components magnetic-particle inspection is preferred for its subsurface detection capability. LPI is used to detect casting and forging defects‚ cracks‚ and leaks in new products‚ and fatigue cracks on in-service components. 1. Section of material with a surface-breaking
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the interaction between electrically charged particles; the areas in which this happens are called electromagnetic fields. It was discovered when it was observed that a copper wire carrying an electric current can magnetize pieces of iron or steel near it. An electromagnet is made from two components‚ a solenoid‚ and a ferromagnetic material. The solenoid is an insulated
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it is to reach the star in 4.0 years‚ as measured by travellers on the spacecraft? (b) How long does the trip take according to Earth observers? 3) Electron in a uniform magnetic field (Q54; Giancoli Chap 26) An electron ( . kg) 31 9 11 10m enters a uniform magnetic field B 1.8 T‚ and moves perpendicular to the field lines with a speed v 0.92c. What is the radius of curvature of its path? See hint for Problem 42. 4) Producing an electron and a positron (Q53; Giancoli Chap 26) What minimum
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