22 magnetism - Wright State University
... now part of western Turkey, stimulated interest during ancient times. A practical application for magnets was found later, when they were employed as navigational compasses. The use of magnets in compasses resulted not only in improved long-distance sailing, but also in the names of “north” and “sou ...
... now part of western Turkey, stimulated interest during ancient times. A practical application for magnets was found later, when they were employed as navigational compasses. The use of magnets in compasses resulted not only in improved long-distance sailing, but also in the names of “north” and “sou ...
ID_4433_Biophys- Electric (c-2)
... the magnitude of an electric current as measured by the quantity of electricity crossing a specified area of equipotential surface per unit time the amount of electric current passing through a cross-sectional area (perpendicular to the direction of current) of a conductor in a given unit of time th ...
... the magnitude of an electric current as measured by the quantity of electricity crossing a specified area of equipotential surface per unit time the amount of electric current passing through a cross-sectional area (perpendicular to the direction of current) of a conductor in a given unit of time th ...
Proposed search for an electric-dipole moment using laser
... less than current experimental limits. However, theories In this paper, we propose an experiment to search for going beyond the SM, such as supersymmetry, predict an atomic EDM using laser-cooled 171 Yb launched in an EDMs within experimental range [2], and are strongly constrained by measured limit ...
... less than current experimental limits. However, theories In this paper, we propose an experiment to search for going beyond the SM, such as supersymmetry, predict an atomic EDM using laser-cooled 171 Yb launched in an EDMs within experimental range [2], and are strongly constrained by measured limit ...
IEPC-2013-062
... of MHD theory, coupling of the closed-field and open-field line regions, and transport that is somewhere between classical and Bohm-like. Issues include control of plasma rotation, the importance of finite Larmor-radius effects, and possibly critical profiles of field and density. It appears that th ...
... of MHD theory, coupling of the closed-field and open-field line regions, and transport that is somewhere between classical and Bohm-like. Issues include control of plasma rotation, the importance of finite Larmor-radius effects, and possibly critical profiles of field and density. It appears that th ...
S. Madhavi, V. Venkataraman, J.C. Sturm, and Y.H. Xie, "Low-and high-field transport properties of modulation-doped Si/SiGe and Ge/SiGe heterostructures: effect of phonon confinement in germanium quantum wells," Phys. Rev. B 61, pp. 16807-16818 (2000).
... cannot define a temperature for transport electrons that are not in the equilibrium state. It is therefore necessary to distinguish mean energy of the relative carrier system characterized by its temperature and the energy associated with the drift motion of the entire carrier system. An accurate me ...
... cannot define a temperature for transport electrons that are not in the equilibrium state. It is therefore necessary to distinguish mean energy of the relative carrier system characterized by its temperature and the energy associated with the drift motion of the entire carrier system. An accurate me ...
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.