PPT-Electric Charge and Electric Field

Chapter 21 2016 Pearson Education Inc Learning Goals for Chapter 21 Looking forward at how objects become electrically charged and how we know that electric charge is conserved how to use Coulombs law to calculate the electric force between charges. Physics 2102. 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 . Balloon and Scotch Tape Electroscope Lab. Balloon Lab. Big Idea. : There exist electrical charges which can repel/attract one another.. Up and atom!. An atom is the smallest unit of a particular element.. 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. Physics 2102. 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.. 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.. 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 . By: Raiden Foris. The attractive or repulsive interaction between any two charged objects is an . electric force. . . video. What is electric force?. Coulomb’s law. The symbol . k. is a proportionality constant known as the Coulomb's law constant. The value of this constant is dependent upon the medium that the charged objects are immersed in. In the case of air, the value is approximately 9.0 x 10^9 N • m^2 / C^2. . 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. Section 6. Dielectrics: . C. onstant currents are impossible. Constant internal electric fields are possible.. No macroscopic currents. Macroscopic field. Might be locally non-zero. Neutral dielectric: Includes only charges belonging to dielectric, namely electrons and protons of neutral constituent atoms. Defining the Electric Field. Michael Faraday suggested the idea of a force field to explain how the electric force can act at a distance.. An . electric field . is a property of the space around a charged object that exerts forces on other charged objects. . Was this a suitable solution to a major shift in thinking? . What role do paradigm shifts play in the progression of scientific knowledge?. Understandings:. Charge. Electric field. Coulomb’s law. Electric current.