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322. Two head lamps of a car are in parallel. They - DST
... Q 79 At a distance 320 km above the surface of earth, the value of acceleration due to gravity will be lower than its value on the surface of the earth by nearly (radius of earth = 6400 km) : (a) (c) ...
... Q 79 At a distance 320 km above the surface of earth, the value of acceleration due to gravity will be lower than its value on the surface of the earth by nearly (radius of earth = 6400 km) : (a) (c) ...
CHAPTER- 1 : FUNDAMENTALS OF MAGETIC
... All practical magnetic circuitcs are so designed that most of the flux produced by an exciting coil is confined to the desired magnetic path of low reluctance. However, a small amount of flux does follow a path through the surrounding air. Figure 5 shows a magnetic circuit with a ferromagnetic core. ...
... All practical magnetic circuitcs are so designed that most of the flux produced by an exciting coil is confined to the desired magnetic path of low reluctance. However, a small amount of flux does follow a path through the surrounding air. Figure 5 shows a magnetic circuit with a ferromagnetic core. ...
The origins of electrical resistivity in magnetic reconnection:
... and ions is 64 per cell for each species with the particle splitting technique to reduce discreteness noise. It is remarked that particle simulation has a reasonable resolution even with fewer grid points than MHD (fluid) simulations because the plasma current and charge are carried by Lagrangean pa ...
... and ions is 64 per cell for each species with the particle splitting technique to reduce discreteness noise. It is remarked that particle simulation has a reasonable resolution even with fewer grid points than MHD (fluid) simulations because the plasma current and charge are carried by Lagrangean pa ...
Magnetic Neutron Scattering
... space and can be replaced by a deltafunction times a constant. These constant, however, may depend on the orientation of the nuclear spin relative to the neutron spin I due to an exchange interaction. Probably the concept of exchange interaction is not familiar to some of you and I mention here with ...
... space and can be replaced by a deltafunction times a constant. These constant, however, may depend on the orientation of the nuclear spin relative to the neutron spin I due to an exchange interaction. Probably the concept of exchange interaction is not familiar to some of you and I mention here with ...
11 - HCC Learning Web
... 26. Two ideal inductors, L1 and L2, have zero internal resistance and are far apart, so their magnetic fields do not influence each other. (a) Assuming these inductors are connected in series, show that they are equivalent to a single ideal inductor having Leq = L1 + L2. (b) Assuming these same two ...
... 26. Two ideal inductors, L1 and L2, have zero internal resistance and are far apart, so their magnetic fields do not influence each other. (a) Assuming these inductors are connected in series, show that they are equivalent to a single ideal inductor having Leq = L1 + L2. (b) Assuming these same two ...
Homework-Coulomb
... Question 7. Field of overlapping charged spheres CALCULATION (Griffiths, Introduction to Electrodynamics, 3rd edition, Problem 2.18) You have two spheres. The first is centered at the origin, has uniform positive charge density and radius R0. The second has uniform negative charge density - sam ...
... Question 7. Field of overlapping charged spheres CALCULATION (Griffiths, Introduction to Electrodynamics, 3rd edition, Problem 2.18) You have two spheres. The first is centered at the origin, has uniform positive charge density and radius R0. The second has uniform negative charge density - sam ...
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.