Jan14 - PHYS142 Lecture 4 Gausss Law Chapter 24 All...

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Gauss’s Law • Chapter 24 All sections 24.1 Electric Flux 24.2 Gauss’s Law 24.3 Application of Gauss’s Law to Various Charge Distributions 24.4 Conductors in Electrostatic Equilibrium 1 PHYS142 Lecture 4
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Overview of Gauss’s law 2 • Alternative procedure to for calculating electric fields. • Based on the inverse-square behavior of the electric field created by a point charge. • Practically no calculus required. • Can be applied for special charge distributions with spherical, cylindrical or planar symmetry. • One of constituent equations of Maxwell’s equation.
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3 Note : The surface area A , perpendicular to the E-field must be considered. i.e. A cos θ , where θ is the angle between the E-field and the perpendicular to the area (surface normal). The total number of E-field lines penetrating a surface of area A , is proportional to EA . Electric flux is the product of the magnitude of the electric field, E and the surface area, A . ( EA : Electric Flux
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Jan14 - PHYS142 Lecture 4 Gausss Law Chapter 24 All...

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