Homework #5 assignment
... Reading assignment: Griffiths sections 8.2 and 9.1 Problem 1. (a) Consider two equal point charges q at the points (x, y, z) = (0, 0, a) and (0, 0, −a). Find the Maxwell stress tensor everywhere on the infinite xy plane equidistant from the two charges. Use rectangular coordinates. (b) By integratin ...
... Reading assignment: Griffiths sections 8.2 and 9.1 Problem 1. (a) Consider two equal point charges q at the points (x, y, z) = (0, 0, a) and (0, 0, −a). Find the Maxwell stress tensor everywhere on the infinite xy plane equidistant from the two charges. Use rectangular coordinates. (b) By integratin ...
Key HW7_2 1. Read the following paper:
... plane and the right half plane. If we put the electrodes near the edge of the tray, the current can only go through one side. This will lead to a current density that is twice as large, and thus to a voltage that is two times larger, resulting in a two times larger resistance. d. Derive equation (1) ...
... plane and the right half plane. If we put the electrodes near the edge of the tray, the current can only go through one side. This will lead to a current density that is twice as large, and thus to a voltage that is two times larger, resulting in a two times larger resistance. d. Derive equation (1) ...
Solar Surface Magneto-Convection
... Long time scale (how long?) Seed field from dispersal of active regions dependence on solar cycle ...
... Long time scale (how long?) Seed field from dispersal of active regions dependence on solar cycle ...
Phys-211104-08-10-06 - Philadelphia University Jordan
... everything in our world from the subatomic to the cosmic scale and will also learn much that will be important in his or her work in the science. The study of physics as a basic science is not particularly easy, but we believe it is rewarding, particularly for students planning further training in r ...
... everything in our world from the subatomic to the cosmic scale and will also learn much that will be important in his or her work in the science. The study of physics as a basic science is not particularly easy, but we believe it is rewarding, particularly for students planning further training in r ...
Photonic-Magnetic Field In interplanetary space 1
... emerged between the 'classical electromagnetism and experiments conducted at the turn of the late nineteenth century and the twentieth century. According to the classical theory developed by Maxwell, the light, the radio waves and UV rays are all electromagnetic radiation, that is, electric fields i ...
... emerged between the 'classical electromagnetism and experiments conducted at the turn of the late nineteenth century and the twentieth century. According to the classical theory developed by Maxwell, the light, the radio waves and UV rays are all electromagnetic radiation, that is, electric fields i ...
Electricity and Magnetism Pt 2
... • alternating current (AC): an electric current that changes direction at regular intervals o For each half rotation of the loop, the current produced by the generator reverses direction. ...
... • alternating current (AC): an electric current that changes direction at regular intervals o For each half rotation of the loop, the current produced by the generator reverses direction. ...
Chapter 19
... 1. A charged particle is moving in a uniform magnetic field. Under what condition is the force on the particle maximum? ...
... 1. A charged particle is moving in a uniform magnetic field. Under what condition is the force on the particle maximum? ...
Document
... • Note that it is a uniform field (i.e. everywhere inside of the solenoid it’s the same). • Lowercase n is the turns per length. ...
... • Note that it is a uniform field (i.e. everywhere inside of the solenoid it’s the same). • Lowercase n is the turns per length. ...
Solutions
... parallel metal rails, which are connected with a strip of metal (see figure). A magnetic field of 0.5 T points out of the page. The separation between the rails is L = 30 cm, the rod has resistance 40Ω, and velocity 70cm/s. What force ( in mN) must be applied to the rod to keep it moving at the cons ...
... parallel metal rails, which are connected with a strip of metal (see figure). A magnetic field of 0.5 T points out of the page. The separation between the rails is L = 30 cm, the rod has resistance 40Ω, and velocity 70cm/s. What force ( in mN) must be applied to the rod to keep it moving at the cons ...
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.