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Electrostatic charges in vx B 1 fields: the Faraday disk
Electrostatic charges in vx B 1 fields: the Faraday disk

... electrostatic charges whose field is just as important as v x B. Indeed, there are many cases where the two fields cancel each other exactly at every point. The Faraday disk and a conducting sphere rotating in a magnetic field will serve as examples, but this little known effect plays a fundamental ...
An Introduction to NMR Spectroscopy
An Introduction to NMR Spectroscopy

... state, B. Refer to Figure 1 for a clear picture of these energy states. For those molecules in which the neighboring hydrogen nucleus exists in the low energy state, its magnetic field (H h) will add to the magnetic field (Ho + He) and for those molecules in which the neighboring hydrogen nucleus ex ...
Field-induced magnetic states in holmium tetraboride
Field-induced magnetic states in holmium tetraboride

... A study of the zero field and field induced magnetic states of the frustrated rare earth tetraboride HoB4 has been carried out using single crystal neutron diffraction complemented by magnetization measurements. In zero field, HoB4 shows magnetic phase transitions at TN1 = 7.1 K to an incommensurate ...
Sample Lesson - Press For Learning
Sample Lesson - Press For Learning

... Uninsulated copper wire will also work if you first put a strip of plastic tape around the nail to insulate it from the wire, and wrap the wire carefully so that the turns of wire are close but not touching. Connecting the wire to the poles of a battery, students can test and note that the core nail ...
Self-Biased 215MHz Magnetoelectric NEMS Resonator for Ultra-Sensitive DC Magnetic Field Detection
Self-Biased 215MHz Magnetoelectric NEMS Resonator for Ultra-Sensitive DC Magnetic Field Detection

... coefficients and sensitivity when the AC excitation magnetic field frequency matches the electromechanical resonance of the laminates. A high magnetoelectric coefficient of 737 V/cm?Oe at the electromechanical resonance frequency of 753 Hz was demonstrated using FeCoSiB/AlN thin film magnetoelectric ...
ジョセフ・カーシュビンク - Caltech GPS
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... process of a fundamental nature, yet is difficult to publish in the peer-reviewed literature. Hence, I take great pleasure in being able to convey to the Japanese Geoscience Union an amusing story – and an important discovery about magnetotactic bacteria – that should have been published over 35 year ...
Lab 10. Magnetic Force
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NMR (Nuclear Magnetic Resonance) and its applications
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... Explanation of the Zeeman effect from the standpoint of classical electron theory The ordinary Zeeman effect may be understood to a large extent using classical electron theory, as it was shown by Lorentz shortly after its discovery. In the model, the emission of light by an electron whose motion a ...
How Electric Motors Work
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PowerPoint Ch 32
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... In moving across an inductor of inductance L along (or against) the presumed direction of the current I, the potential change is ΔV = –L dI/dt (or +L dI/dt, respectively). Magnetic materials will change selfinductance by changing magnetic flux ...
Electromagnetic Induction HW Name: 1) The figure above shows a
Electromagnetic Induction HW Name: 1) The figure above shows a

... 5) Two circular coils are situated perpendicular to the z-axis as shown above. There is a current in the primary coil. All of the following procedures will induce a current in the secondary coil EXCEPT (A) rotating the secondary coil about the z-axis (B) rotating the secondary coil about a diameter ...
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Force Field Physics - 8.PS.1
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Poster_IAEA 2000 - Helically Symmetric eXperiment
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... component due to the earth’s field is not ignorable, this spectral component and the dominant helical term b41 can be experimentally determined. The data does not show the magnitude and direction of the orbit shift that would be expected from the standard toroidal curvature term that exists in other ...
ECE259: Electromagnetism
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Experimental studies on ion acceleration and stream line
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... We have studied the ion flow velocity field of an ECR plasma in a diverging magnetic field, where the electrons are magnetized in the whole plasma region while the ions are marginally magnetized in the downstream region. The flow velocity field has been obtained with the calibrated DLPs and the deta ...
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... about the properties of metals. Students use information from their notebooks to write the piece Students read aloud to another student (self-edit) Peer editing ...
couplesmag
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... at which magnetic order originates. It is true, nevertheless, that for the compound of CoCh with graphite a certain anomaly of the specific heat is observed in the vicinity of 8.2 K. With lowering of the temperature the specific heat falls sharply, but at 8.2 K there is noticeable on the smooth curv ...
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... motor, which in turn generates electricity and this is measured using the apparatus provided. We want to measure the amount of electricity produced at different cycling speeds (revolutions per minute or RPM). Carrying out this portion of the lab will involve some amount of teamwork, for each measure ...
THE EFFECT OF MAGNETIC FIELD ON WATER HARDNESS
THE EFFECT OF MAGNETIC FIELD ON WATER HARDNESS

... The first commercial device was patented in Belgium in 1945 (Vemeiren [29]). Powerful electromagnets were used in hot water systems since the 1960s in the Soviet Union (Grutsch [10]). The application of magnetic treatment was reported in the United States since 1975 (Grutsch & McClintock [11]). The ...
Journal of Physics Special Topics
Journal of Physics Special Topics

6-5.3 - S2TEM Centers SC
6-5.3 - S2TEM Centers SC

... 2. Discuss their observations of the motor. What did they find? Where was the electromagnet? How is an electromagnetic important to a motor? An electric motor changes electrical energy into mechanical energy. The motor contains the electromagnet that rotates between the poles of a magnet. In a batte ...
Can the Imaginary Part of Permeability be Negative?
Can the Imaginary Part of Permeability be Negative?

physics engines and generators notes File
physics engines and generators notes File

... on a large scale. Electricity is also relatively easy to distribute. Electricity authorities use high voltage transmission lines and transformers to distribute electricity to homes and industries around each state. Voltages from power stations can be as high as 500 000 volts but by the time this re ...
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Magnet



A magnet (from Greek μαγνήτις λίθος magnḗtis líthos, ""Magnesian stone"") is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism.Ferromagnetic materials can be divided into magnetically ""soft"" materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically ""hard"" materials, which do. Permanent magnets are made from ""hard"" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a powerful magnetic field during manufacture, to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. ""Hard"" materials have high coercivity, whereas ""soft"" materials have low coercivity.An electromagnet is made from a coil of wire that acts as a magnet when an electric current passes through it but stops being a magnet when the current stops. Often, the coil is wrapped around a core of ""soft"" ferromagnetic material such as steel, which greatly enhances the magnetic field produced by the coil.The overall strength of a magnet is measured by its magnetic moment or, alternatively, the total magnetic flux it produces. The local strength of magnetism in a material is measured by its magnetization.
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