Drift velocity and temporal phase fluctuations of sliding charge
... current may be homogeneous within the sample V (t ) is nearly periodic and the frequency spectrum V2(v) of the fluctuations of V2(t) consists of a narrow line with harmonics. In the Rbo.3Mo03 sample investigated the voltage fluctuation spectra are complex mainly due to an inhomogeneity of the CDW cu ...
... current may be homogeneous within the sample V (t ) is nearly periodic and the frequency spectrum V2(v) of the fluctuations of V2(t) consists of a narrow line with harmonics. In the Rbo.3Mo03 sample investigated the voltage fluctuation spectra are complex mainly due to an inhomogeneity of the CDW cu ...
A Multiphysics Approach to Magnetron and Microwave Oven Design
... and the radiation they release can interfere with the operation of wireless networks. This paper presents a multiphysics simulation of a magnetron using CST STUDIO SUITE®, with the aim of testing the electrical, magnetic, thermal and mechanical characteristics of a low-interference magnetron design. ...
... and the radiation they release can interfere with the operation of wireless networks. This paper presents a multiphysics simulation of a magnetron using CST STUDIO SUITE®, with the aim of testing the electrical, magnetic, thermal and mechanical characteristics of a low-interference magnetron design. ...
1 Material Properties of Plastics - Wiley-VCH
... Plastic composites consist of a polymeric matrix with integrated particles or fibers. When using thermoplastics as matrix, such composites can be melted. If thermosets are used as matrix the composite cannot be melted. Characteristic of the different classes of plastics are the phase transitions that ...
... Plastic composites consist of a polymeric matrix with integrated particles or fibers. When using thermoplastics as matrix, such composites can be melted. If thermosets are used as matrix the composite cannot be melted. Characteristic of the different classes of plastics are the phase transitions that ...
Texte intégral / Full text (pdf, 1 MiB) - Infoscience
... I would first like to thank Charlie Slichter for welcoming me in his research group. He has always been very enthusiastic about the experiments I performed and his fabulous experience in physics and NMR in particular was of invaluable help. The opportunity of working in the Physics Department of the ...
... I would first like to thank Charlie Slichter for welcoming me in his research group. He has always been very enthusiastic about the experiments I performed and his fabulous experience in physics and NMR in particular was of invaluable help. The opportunity of working in the Physics Department of the ...
An introduction to magnetic reconnection
... •Superfluids: Reconnection of quantized vortex elements [e.g. Koplik, J. and Levine, H., Vortex reconnection in superfluid helium, Phys. Rev. Letters 71, ...
... •Superfluids: Reconnection of quantized vortex elements [e.g. Koplik, J. and Levine, H., Vortex reconnection in superfluid helium, Phys. Rev. Letters 71, ...
Document
... 14. Is the Resistance of Voltmeter larger than or smaller than the resistance of Galvanometer from which it is converted. Ans: Larger 15. A Magnetic Field dipole placed in a Magnetic Field experiences a net force. What can you say about the Nature of Magnetic Field? Ans: Non-uniform. 16. Earth’s Mag ...
... 14. Is the Resistance of Voltmeter larger than or smaller than the resistance of Galvanometer from which it is converted. Ans: Larger 15. A Magnetic Field dipole placed in a Magnetic Field experiences a net force. What can you say about the Nature of Magnetic Field? Ans: Non-uniform. 16. Earth’s Mag ...
H2 Physics - Yearly Solutions - 2008 - 29+1pp - v3.07
... so that the test charge does not create any forces on nearby charges ...
... so that the test charge does not create any forces on nearby charges ...
Superconductivity
Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911 in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics.The electrical resistivity of a metallic conductor decreases gradually as temperature is lowered. In ordinary conductors, such as copper or silver, this decrease is limited by impurities and other defects. Even near absolute zero, a real sample of a normal conductor shows some resistance. In a superconductor, the resistance drops abruptly to zero when the material is cooled below its critical temperature. An electric current flowing through a loop of superconducting wire can persist indefinitely with no power source.In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above 90 K (−183 °C). Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors. Liquid nitrogen boils at 77 K, and superconduction at higher temperatures than this facilitates many experiments and applications that are less practical at lower temperatures.