PHYS 122 - Gauss's Law

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Based of Volume 2 of Physics for Engineers and Scientist 3rd Edition by Ohanian and Markert

Physics

Electric Charge, Field, & Potential

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9 Terms

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Why is Gauss’s Law Helpful?

It Allows us to calculate electric fields of high symmetry much easier than the Columbic Method.

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Electric Flux (Word Form)

Product of the area A of a surface and the normal component of the electric field.

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Electric Flux (Equation Form)

E(Perpendicular)A; EACos(theta)

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Electric flux for an Arbitrary Shape

Integral of E perpendicular to dA

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Gauss’ Law

Electric Flux = Path Integral of Energy Field times dA = Qinside/Epsilon(nought)

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Gauss’ Law Spherical

E*4pir² = Qinside/Epsilon(nought)

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Gauss’ Law Cylindrical

E*2pirL = Qinside/Epsilon(nought)

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Gauss’ Law Planar

2EA = Qinside/Epsilon(nought), EA = Qinside/Epsilon(nought)(Only one side inside of plane)

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Electric Fields and Conductors

Fields within a conductor are Zero, and charges move to the surface of the material. This is called electrostatic equilibrium.