circuits a. Circuit diagrams b. Series and parallel circuits c. Action and use of circuit components d. Digital electronics 4.4 Dangers of electricity 4.5 Electromagnetic effects a. Electromagnetic induction b. a.c. generator c. Transformer d. The magnetic effect of a current e. Force on a current carrying conductor f. d.c. motor 4.6 Cathode-ray oscilloscopes a. Cathode rays b. Simple treatment of cathode-ray oscilloscope Atomic physics 5.1 Radioactivity a. Detection of radioactivity b. Characteristics
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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 the distance measured perpendicularly from a long current-carrying wire
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superconductors. Current MRI’s use superconducting magnets to create a magnetic field in the body. Hydrogen atoms present in the body release it at a frequency that can be detected by computers. Then displayed to give an image of the human body. Another superconductor is the superconducting quantum interference (SQUID). It has the ability to detect a change in the magnetic field. The device is used to probe the id without the need of strong magnetic fields or MRIs. SQUID also allows the ability to look at the
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through which vary or alternating current (AC) is passed. 3. A varying current flowing in a test coil produces a varying electromagnetic field around the coil‚ As shown in this diagram Amperage * # of coils= strength of magnetic field 4. The electromagnetic field produced around the coils is directly proportional to the magnitude of applied current‚ rate of change in current or frequency and the coil parameters. 5. Coil parameters include: Inductance‚ diameter
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heard of other people’s supernatural experiences such as a ghost possessed and near-dead experience but only few of you experienced on your own. So why and how it can happen? III. Explanation A. The existence of the human magnetic field B. The proximity of the magnetic oscillation frequency C. Energy conversion Transition: You may think that what I’ve told you are just crapping. Believe it or not‚ now I’m going to tell you some true stories that happened from my friends. III. True story at:
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In physics‚ the term solenoid refers to a long‚ thin loop of wire‚ often wrapped around a metallic core‚ which produces a magnetic field when an electric current is passed through it. Solenoids are important because they can create controlled magnetic fields and can be used as electromagnets. The term solenoid refers specifically to a magnet designed to produce a uniform magnetic field in a volume of space (where some experiment might be carried out). In engineering‚ the term solenoid may also refer
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understanding of the more common Brushed DC Motor which is present in many household items. The brushed DC motor consists of a rotor (the part that rotates) containing several coils of wire. This is attached to the output shaft. The rotor is surrounded by a magnetic field (this is usually a permanent magnet‚ but can be an electro magnet). Electrical connection to the rotor is accomplished via a device called a commutator. A commutator is basically a conductive ring that rotates with the rotor shaft. This ring
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and bigger an issue. Therefore‚ it is only natural that demands for it are growing rapidly. To meet this demand‚ yet another form of transportation has been introduced: the Maglev train. Maglev‚ derived from the term magnetic levitation‚ is a method of propulsion that uses magnetic levitation to propel vehicles with electromagnets rather than with wheels‚ which causes friction and can wear out the rails. With maglev‚ a vehicle is levitated a short distance away from a guide way using magnets to create
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B. Memristor Memristor‚ the contraction of memory resistor‚ is a passive device that provides a functional relation between charge and flux. It is defined as a two-terminal circuit element in which the flux between the two terminals is a function of the amount of electric charge that has passed through the device. The Memristor is not an energy storage element. The most notable property of a memristor is that it can
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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 then constructed
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