Chapter24-S09 - = = = = surface i i A E i i i i E A d E A E...

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Unformatted text preview: = = = = surface i i A E i i i i E A d E A E A E A E i lim cos The product of the magnitude of the electric field E and surface area A perpendicular to the field is called the electric flux E : E = EA. Electric flux is proportional to the number of electric field lines penetrating some surface. Chapter 24 Gausss Law Electric 24.1 Electric Flux cos ' EA EA E = = EA E = Consider the closed surface in the left figure. The area vectors A i are, by convention, normal to the surface and point outward. The flux through an area can be: positive (1), E line leaving the surfa zero (2), E line parallel to the surfa negative (3), E line entering the surf HW 24.4, 7 (24.4, 24.9) 24.2 Gausss Law Let us consider a spherical closed (Gaussian) surface of radius r surrounding a point charge q . ( 29 2 2 4 4 q q k r r q k dA E EdA A d E e e E = = = = = = The net flux...
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Chapter24-S09 - = = = = surface i i A E i i i i E A d E A E...

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