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11. Physics 2415 Lecture 3. 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. Presentation of the Bagong Alyansang Makabayan. S. ayaw sa . B. ubog…. Why charter change now?. Current moves for cha-cha should be understood within the context of the current political crisis besieging Mrs. Arroyo as well as pressures brought about by the crisis of the world capitalist system. . HW2:Chapter 21, Pb.1, Pb.12, Pb.13, Pb.25, . Pb.31, . Pb.36,Due Wednesday, Jan.25. 21.1 Electric Charge, q or Q. Charge comes in two types. 1e = 1.6x10. -19. Coulombs (unit of charge) fundamental unit of charge. CHISA 2016, Prague (Czech Republic). Dept. . of Electronics and Electromagnetism, Faculty of Physics, University of Seville, Spain.. . Project leader (PH.D. director): M.A.S. Quintanilla.. IFPRI Ph.D. student: J. Pérez-Vaquero.. Positive. Negative. It can’t happen!. The magnitude of an electric field due to a point charge . q. at a distance . r. away depends on the strength of the charge of a test particle. True. False. Positively charged . Electrons on an insulator (zoomed in).. Zoomed out – difficult to “see” individual electrons . smooth distribution of charge..  Like charge is “smeared” on the insulator.  . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -. Gauss. ’ law. Physics 2102. Gabriela Gonz. á. lez. Carl Friedrich Gauss . 1777-1855. Q. r. l. =Q/L. r. l. =Q/2R. q. q. r. = R. q. l. =Q/2. p. R. r. q. r. s. . =Q/. p. R. 2. Electric field lines and forces. 1. When the balloon is rubbed on the sweater, what might happen?. A. . Some positive charges in the sweater will move onto the balloon. B. Some negative charges in the sweater will move onto the balloon. Rank. Responses. 1. 2. 3. 4. 5. 6. For a fixed electric field . E, . the flux . Φ. E. increases with cross . sectional area.. True. False. The signs of point charges q. 1. and q. 2. are:. q. 1. , q. © 2014 Pearson Education, Inc.. Contents of Chapter 16. Static Electricity; Electric Charge and Its Conservation. Electric . Charge in the Atom. Insulators . and Conductors. Induced . Charge; the Electroscope. electron cloud. and . nucleus. in opposite directions: . electric dipole. .. An atom is said to be . polarized. when its . electron cloud. has been shifted by the . influence of an external charge. 18.1 . The Origin of Electricity. The electrical nature of matter is inherent. in atomic structure.. coulombs. 18.1 . The Origin of Electricity. In nature, atoms are normally. found with equal numbers of protons. Static Electricity. Static Electricity-. accumulation of excess electric charges on an obj. pg. 194. Protons = + electrical charge. Electrons= - electrical charge . Example of electron transfer: . NameCarlos A OtalPracticeGlobal Public SectorLocationAlexandria VARegionGlobal Public SectorTitleNational Managing PartnerAreas of responsibilityMr Otal is the National Managing Partnerin Grant Thornt