Lecture21

Lecture21 - 1 Lecture 21 Chapter 22. Patterns of Field in...

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Unformatted text preview: 1 Lecture 21 Chapter 22. Patterns of Field in Space Gauss Law 4/5/11 2 Gauss Law *relates the electric fields at points on a closed Gaussian surface and the net charge enclosed by that surface. ? 4/5/11 3 Concept of Flux v Air stream with uniform velocity, v , flows through a loop of area A = volume time can define a flux: 4/5/11 4 Flux of an Electric Field Gaussian surface of arbitrary shape immersed in a non-uniform electric field 2 Perpendicular field cos AE A n E = = AE A n E Perpendicular area cos cos y x E A E A n E = = x y = A E A n E Electric Flux: Perpendicular Field or Area q 4/5/11 6 Example: Flux through a Cube Consider a uniform electric field oriented parallel to the x - direction. Find the net flux through the surface of a cube of edge L oriented as shown. y E x z 4/5/11 7 Gauss Law o E ndA = q enc + - Gausss Law: Superposition 3...
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Lecture21 - 1 Lecture 21 Chapter 22. Patterns of Field in...

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