![Exercises in Statistical Mechanics ====== [A] Ensemble Theory - classical gases](http://s1.studyres.com/store/data/008930185_1-59cc607a5cbfa43d1c480bd3c23f15ec-300x300.png)
Magnetism
... atoms of the magnetic material. This effect is called hysteresis. The word hysteresis means "to lag behind," which describes how the change in B lags behind the change in H. We can now reverse the current through the coil [see part (e) of the figure]. Since the current is flowing through the coil in ...
... atoms of the magnetic material. This effect is called hysteresis. The word hysteresis means "to lag behind," which describes how the change in B lags behind the change in H. We can now reverse the current through the coil [see part (e) of the figure]. Since the current is flowing through the coil in ...
Waveguide coupling by apertures: (from Collin)
... The field radiated in to the region z 0 is that radiated by the magnetic dipole M, as illustrated in Figure D.III.2.2.b. This dipole is equivalent to a half circular current loop in the yz plane as illustrated. To find the field radiated by this dipole in the presence of the conducting transverse ...
... The field radiated in to the region z 0 is that radiated by the magnetic dipole M, as illustrated in Figure D.III.2.2.b. This dipole is equivalent to a half circular current loop in the yz plane as illustrated. To find the field radiated by this dipole in the presence of the conducting transverse ...
Phys
... 14) A good reason for adding a dielectric material between the plates of a capacitor: (A) Dielectrics do not break down (allowing electric charge to flow) as readily as air, so a higher voltage can be applied without charge passing across the gap. (B) A dielectric allows the plates to be placed clos ...
... 14) A good reason for adding a dielectric material between the plates of a capacitor: (A) Dielectrics do not break down (allowing electric charge to flow) as readily as air, so a higher voltage can be applied without charge passing across the gap. (B) A dielectric allows the plates to be placed clos ...
BDTIC www.BDTIC.com/infineon TLE4946-2L
... 2.7 V to 18 V supply voltage operation Operation from unregulated power supply High sensitivity and high stability of the magnetic switching points High resistance to mechanical stress by active error compensation Reverse battery protection (Vs = -18V) Superior temperature stability Peak temperature ...
... 2.7 V to 18 V supply voltage operation Operation from unregulated power supply High sensitivity and high stability of the magnetic switching points High resistance to mechanical stress by active error compensation Reverse battery protection (Vs = -18V) Superior temperature stability Peak temperature ...
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.