Magnetic stirrer

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    Results An initial resistance versus magnetic field measurement on NdMo16O44 reveals a pronounced magnetic hysteresis effect when a magnetic field is applied perpendicular to the current, but with unknown orientation with respect to the crystal axes, as shown in Fig. 2a for temperatures from 12K to 30K (at temperature below 12K, the overall resistance is too high to produce low-noise measurements with resolvable magnetoresistance features). The individual plots are offset to better show the effect. A sharp drop in the magneto-resistance on the order of 30% of the zero-field resistance appears at a temperature of 12K, with local extrema at fields of approximately +0.38T and +0.55T (-0.38T and -0.55T, respectively) when the field is swept from…

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    What is a circuit? How do they work? An electric circuit is a kind of path made up of wires that allows the flow of electrons. The circuit has to be made in a circular form, as the electrons must frequently move in a full loop, in which they will return to their original position and then complete the loop again. (“What is an electric circuit?”) The battery or another source of power provides the voltage, or ‘electrical push’, that makes the electrons move through the circuit. When the electrons…

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    the compass, the Age of Discovery began. In 1820 while giving a lecture, Hans Christian Oersted noticed that a compass’s needle shifted from magnetic north. This drew him to curiosity about the relationship between electric force and magnetic force, so he began researching. Oersted discovered that electric currents make magnetic fields. This impacted the concept of electromagnetism heavily. Before Oersted, people knew about magnetic and electrical force, but no one had thought of the…

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    pictures and copy and paste it and save it to their phone and PC device. Also, people may share the content. Overall, posts and personal content never disappear and vanish for good. Next, both authors are similar when they lecture about the older generation is not as skilled as their younger counterparts, and face many troubles with computers. Nixon mentions, "The other day, I had troubles accessing Photoshop through our home network. The program was on my other computer, so I had to whip…

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    Tesla Coil Essay

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    In essence, Tesla coils are a high-voltage, resonant transformer circuits. They consist of the six major components (Behrend 1), namely: Primary transformer Tank capacitor Spark gap Primary coil Secondary coil Toroid Figure 1: Tesla coil (diagram) A primary transformer is a step-up transformer that takes the line voltage of the AC source and steps it up to a range between 12 kV and 50 kV at 60 Hz (Johnson 4). The efficiency of this transformer is largely dependable on the construction…

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    Magnets Research Paper

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    granted is the magnetic…

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    Rotor and touchdown bearing models Fig. 1 features the case study of the high-speed rotor. The photo was taken after manufacturing of the electric motor part, when the rotor was carried to the laboratory for an experimental modal analysis. During normal operation, the rotor is supported by AMBs. In the dropdown event, the rotor is in contact with touchdown bearings at both ends of the rotor. Fig. 1. Rotor under investigation. In this work, the finite element model of the rotor employs…

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    Stray current corrosion: Stray current is the current which occurs when conductors are placed between high magnetic or electric fields. Presence of stray currents over the PCB surface can generate corrosion problems. The below figure 5 shows severe corrosion damage to micro wave module for 24 GHz. This equipment is built in controlled conditions where water condensation is possible. After few hours of use, severe corrosion was seen on the surface. Figure 5. Stray current corrosion of a micro…

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    Magnet Essay

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    When a magnet is in motion near a non-magnetic conductor such as copper and aluminium eddy currents are induced in the conductor, causing a dissipative force called magnetic braking force, or a change in magnetic flux (figure 2). This force is dependent on: The size and shape of the conductor and magnet The strength of the magnet (μ) The conductors conductivity (σ_c) The distance between the conductive surface and the magnet (d) The velocity of the magnet (v) According to Faraday’s law,…

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    calculate the angle of twist, the length of the sample, polar moment of inertia, and shear modulus of the sample material would have to be considered constants. A picture of a torsion load cell from Instron is shown in Figure 2. Figure 2: Torsion Load Cell7 The size of the torsion load cell may also be an issue, depending on the size of the torsion device that will be built. The diameter of the load cell in Figure 2 is 54 mm, which is about 10 mm larger than the digital inclinometer. Magnetic…

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