Siena PHYS 120 - Chapter 16 Notes - Electrostatics

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1Ch 16: Electrostatics electric charges that are not moving Definition of new symbols e- = electron p = proton n = neutron e+ = positronCoulomb’s Law k = 9.0 x 109 N m2/C2 Coulomb’s contant Q1, Q2 = charges measured in Coulombs (C) 1 C is a lot of charge! r = distance between Q1 and Q2Electric Force Similar form as gravitational force(weird, huh?), except positive and negative charges Like charges repel; opposite chargeattractFigure 16-13Figure 16-15Charge CarriersThe electronThe electron 1 e- = -1.602 x 10-19 C smallest unit of charge, also referred to as e negatively charged Charge of 1 e- is -1eThe protonThe proton 1 p = 1.602 x 10-19 C positively charged Charge of 1 p is +1e Charge is quantized!Think-Pair-Share What is the electrostatic force betweenan e- and a p in a Hydrogen atom, giventhe radius of the H atom is 0.5x10-10 m?Coulomb’s Lawwith different constants(more relevant to future chapters)2Illustrations of Coulomb’s Law Comb & PaperIllustrations of Coulomb’s Law Electroscopeinduction conductionIllustrations of Coulomb’s Law Van de Graaff generator & pie platesIllustrations of Coulomb’s Law Flowing water & charged rodConductor versus InsulatorConductorInsulatore-’s travelcharge separation within


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Siena PHYS 120 - Chapter 16 Notes - Electrostatics

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