MAGNETIC DEFLECTION
... OBJECTIVE: To observe the effect of a magnetic field on an electron beam. To measure the Earth’s magnetic field. THEORY: Moving charges exert forces on one another that are not observed when the charges are stationary. These forces can be described in terms of a magnetic field just as the electric f ...
... OBJECTIVE: To observe the effect of a magnetic field on an electron beam. To measure the Earth’s magnetic field. THEORY: Moving charges exert forces on one another that are not observed when the charges are stationary. These forces can be described in terms of a magnetic field just as the electric f ...
On superconductivity of matter at hight density and the
... To date no such easy experiment has been performed which has allowed one to separate chiral nuclei or nucleons. Note that the chiral objects of Pasteur had lifetimes and interactions with each other and their mirror images (enantiomers) which were such, that the chiral objects preferred their like p ...
... To date no such easy experiment has been performed which has allowed one to separate chiral nuclei or nucleons. Note that the chiral objects of Pasteur had lifetimes and interactions with each other and their mirror images (enantiomers) which were such, that the chiral objects preferred their like p ...
2008-SRJC-PH-H2-J2-CT-w-soln
... (iv) The ammeter should be connected in series with the resistive wire so as to measure the current in the wire only.[1] The voltmeter should be connected across the ammeter and the wire to measure the p.d across the wire since the pd across the ammeter is negligible as the resistance of the ammeter ...
... (iv) The ammeter should be connected in series with the resistive wire so as to measure the current in the wire only.[1] The voltmeter should be connected across the ammeter and the wire to measure the p.d across the wire since the pd across the ammeter is negligible as the resistance of the ammeter ...
Unit of electric current
... In general, resistivity decreases as temperature decreases. Some materials, however, have resistivity that falls abruptly to zero at a very low temperature, called the critical temperature, TC. ...
... In general, resistivity decreases as temperature decreases. Some materials, however, have resistivity that falls abruptly to zero at a very low temperature, called the critical temperature, TC. ...
![L 29 Electricity and Magnetism [6] Laws of Magnetism The electric](http://s1.studyres.com/store/data/001482032_1-b69d1eb7a0f8c001e0e2a09bf26d62d2-300x300.png)
phys1444-spring12-040412-post
... B due to current I in a straight wire. For the field near a long straight wire carrying a current I, show that the Biot-Savarat law gives the same result as the simple long straight wire, B= 0I/2R. What is the direction of the field B at point P? Going into the page. All dB at point P has the same ...
... B due to current I in a straight wire. For the field near a long straight wire carrying a current I, show that the Biot-Savarat law gives the same result as the simple long straight wire, B= 0I/2R. What is the direction of the field B at point P? Going into the page. All dB at point P has the same ...
bio and abstract
... disciplines, spintronics and molecular electronics. A fundamental link between these two fields can be established using molecular magnetic materials and, in particular, single-molecule magnets, which combine the classic macroscale properties of a magnet with the quantum properties of a nanoscale en ...
... disciplines, spintronics and molecular electronics. A fundamental link between these two fields can be established using molecular magnetic materials and, in particular, single-molecule magnets, which combine the classic macroscale properties of a magnet with the quantum properties of a nanoscale en ...
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.