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T060189-00
... In materials with temperature-dependent permittivity, the application of a dynamic electric field induces temperature gradients and thus irreversible heat flow, leading to dissipation of energy. When the applied electric field is the optical field of a laser beam in LIGO, the energy dissipated due t ...
... In materials with temperature-dependent permittivity, the application of a dynamic electric field induces temperature gradients and thus irreversible heat flow, leading to dissipation of energy. When the applied electric field is the optical field of a laser beam in LIGO, the energy dissipated due t ...
The Science Case for SPICA Far
... Crutcher (2007) summarized how polarimetry may be used to test star formation theory. He considered two cases: a magnetically-supported cloud, and a turbulence-dominated cloud. The essential measurements to distinguish these cases are the magnetic field strength and morphology. The magnetic field st ...
... Crutcher (2007) summarized how polarimetry may be used to test star formation theory. He considered two cases: a magnetically-supported cloud, and a turbulence-dominated cloud. The essential measurements to distinguish these cases are the magnetic field strength and morphology. The magnetic field st ...
Stratton Products Ltd. Electronics Tutorial, about `Magnetism`
... direction of the electron flow from negative to positive. The position of the fingers laid across the conductor willnow point in the direction of the magnetic lines of force as shown. If the direction of the electron flowing through the conductor is reversed, the left hand will need to be placed ont ...
... direction of the electron flow from negative to positive. The position of the fingers laid across the conductor willnow point in the direction of the magnetic lines of force as shown. If the direction of the electron flowing through the conductor is reversed, the left hand will need to be placed ont ...
Introduction to Electric Fields
... The correct response is “The field of a charge is always there, even if the charge is not interacting with any other charges. The magnitude of the field at any location depends only on the magnitude of the charge, not on the mass of the charge.” Students fill in Question 4 in Worksheet. Teache ...
... The correct response is “The field of a charge is always there, even if the charge is not interacting with any other charges. The magnitude of the field at any location depends only on the magnitude of the charge, not on the mass of the charge.” Students fill in Question 4 in Worksheet. Teache ...
Dynamic Demagnetization Computation of Permanent Magnet
... electric circuits and mechanical balance equation, has many salient merits such as flexibility to model complex geometries, standardized programming techniques, high accuracy and allowing the inclusion of high-order harmonics. Hence they are widely used to simulate the dynamic operation of electric ...
... electric circuits and mechanical balance equation, has many salient merits such as flexibility to model complex geometries, standardized programming techniques, high accuracy and allowing the inclusion of high-order harmonics. Hence they are widely used to simulate the dynamic operation of electric ...
Sample Paper JEE Adv-1
... SECTION-1 : (One or More than one options correct Type) This section contains 10 multipole choice questions. Each questions has four choices (A), (B), (C) and (D) out of which ONE or MORE THAN ONE are correct ...
... SECTION-1 : (One or More than one options correct Type) This section contains 10 multipole choice questions. Each questions has four choices (A), (B), (C) and (D) out of which ONE or MORE THAN ONE are correct ...
Superconductivity
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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.