Gauss' Law: Understand How to Calculate Flux

[sayuri2009]

Homework Statement

Gauss Law for flux

Relevant Equations

flux = Integration E ds = Q / e0

Hello everybody

To calculate the flux for the electric field I need the gauss law. There are two formula one with the integration over some area and the other is Q/e0. When do I have to use which one?

 

[kuruman]

Homework Statement:: Gauss Law for flux
Relevant Equations:: flux = Integration E ds = Q / e0

Hello everybody

To calculate the flux for the electric field I need the gauss law. There are two formula one with the integration over some area and the other is Q/e0. When do I have to use which one?
View attachment 275550

I depends on what is given to you. If you know the electric field, you do the integral to find the flux. If you know the charge enclosed by the surface, you divide that charge by ε₀ and you have the flux through the surface.