PPT-Physics 05: Electric Currents

BY HEI MAN KWOK 12N03S 51 electric potential difference current and resistance Model of electric conduction in a metal energy transfer Charge carriers have kinetic energy These collide with lattice ions . with George Ellery Hale. Magnetic Helicity: from Turbulent Convection to Space Weather . Richard C. Canfield. Department of Physics. Montana State University, Bozeman. Data courtesy Solar Dynamics Observatory AIA & HMI. magnetism. Faraday’s Law of Electromagnetic Induction. induced currents. electric generator. eddy currents. Electromagnetic Waves (Maxwell & Hertz). 1. Basic facts of Magnetism. Oersted. . discovered that a compass needle responded to the a current in a loop of wire. A . positive charge . might . be placed at one . of . three . spots in a . region where there . is a uniform . electric field. . . How does the electric potential energy, . U. elec. , on the charge . Is it possible to light a bulb . with a battery using only one wire?. Yes. No. I have no idea. NEXUS/Physics Clicker Questions. Which of the arrangements shown . will light the bulb?. Only A. Only B. Magnets and magnetic fields. Magnets and magnetic fields. Magnets got their name from the region of Magnesia, which is now part of modern-day Greece.. The first naturally occurring magnetic rock, called . Key Points. Ohm’s Law. Resistivity. Electric Power. Alternating Current. References. . 18-1,2,3,4,5,6,7. Electric current is the rate of flow of charge through a conductor:. Unit of electric current: the ampere, . magnetism. Faraday’s Law of Electromagnetic Induction. induced currents. electric generator. eddy currents. Electromagnetic Waves (Maxwell & Hertz). 1. Basic facts of Magnetism. Oersted. . discovered that a compass needle responded to the a current in a loop of wire. wind, salinity, temperature, the Coriolis Effect, and gravitational pull.. 14)Ocean . currents flow in . predictable patterns. around the earth.. 15) Differences . in . density. and . temperature. causes currents.. Gabriela Gonz. á. lez. Physics 2102 . Electric potential energy, . electric potential. Electric potential energy. of a system = . = . -. work (against electrostatic forces) needed to needed to build the system . Gabriela Gonz. á. lez. Physics 2102 . Electric Potential on Perpendicular Bisector of Dipole. You bring a charge of -3C from infinity to a point P on the perpendicular bisector of a dipole as shown.. No Class on Wednesday March 8. Labs taught by Dr. . Mahes. on Monday and Tuesday.. No quiz on . Friday, March 10. Exam 2 on Friday, March 24, study guide posted online. Current from a battery flows steadily in one direction (direct current, DC). Current from a power plant varies sinusoidally (alternating current, AC).. Michael Fowler, UVa. Today’s Topics. Continuous charge distributions: line of charge. Visualizing the field: lines of force. Electron moving in a field. Electric dipoles. Superposition. The . total electric force . Prof. Hao Zhu. Dept. of Electrical and Computer Engineering. University of Illinois at Urbana-Champaign. haozhu@illinois.edu. 12/9/2014. 1. Lecture 26. : Geomagnetic Disturbance . (. GMD) . Modeling. Nature of science: . . Although Ohm and Barlow published their findings on the nature of electric current around the same time, little credence was given to Ohm. Barlow’s incorrect law was not initially criticized or investigated. This is a reflection of the nature of academia of the time with physics in Germany being largely non-mathematical and Barlow held in high respect in England. It indicates the need for the publication and peer review of research findings in recognized scientific journals..