diff --git a/education/physics/PHYS2220/Gauss's Law.md b/education/physics/PHYS2220/Gauss's Law.md index 3aa4ff2..952ac00 100644 --- a/education/physics/PHYS2220/Gauss's Law.md +++ b/education/physics/PHYS2220/Gauss's Law.md @@ -11,4 +11,12 @@ $$ \Phi = EA$$ If the area is tilted relative to the field, then the strength of the field is reduced by a factor of $\cos \theta$, where $\theta$ is the angle between the electric field $\vec{E}$ and a vector $\vec{A}$ that's normal to the surface. This generalizes our flux equation to $\Phi = EA\cos\theta$ . --- -I don't understand what the below section \ No newline at end of file +I don't understand what the below section means, but copying it for posterity: +The electric flux through any closed surface is proportional to the net charge enclosed by that surface. This would be written mathematically as: +$$ \Phi = \oint \vec{E} \cdot d\vec{A} \alpha q_{enclosed} $$ + +$$ \Phi = \oint \vec{E} \cdot d\vec{A} = \oint EdA \cos\theta$$ + + + +--- \ No newline at end of file