p2f10_lec01_gauss_law - Physics 1200 Lecture 1 Fall 2010...

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Unformatted text preview: Physics 1200 Lecture 1 Fall 2010 Electric field review Maxwells Equations Flux of a Field, The surface normal Using Gauss Law to find the field The Electric Field F E q = r r For a point charge q , the force on q is, Then, at q s location, 2 1 4 qq F r = 2 1 4 F q E q r = = Representing the Field: Electric Field of a Positive Point Charge This picture shows the electric field vector at several points. Representing the field: Electric Field Lines Electric field lines show the direction of E at any point. The magnitude of E is proportional to the density of electric field lines. Electric field lines originate on positive charges and terminate on negative charges, unless they extend to infinity. Electric Field Lines for a Negative Point Charge Electric Field Lines for Two Charges Electric field is also represented by the yellow vectors. Four ways to find the field 1. Measure the force on a known charge....
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p2f10_lec01_gauss_law - Physics 1200 Lecture 1 Fall 2010...

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