- #1
ehabmozart
- 213
- 0
It is asked to find the electric flux through a "gaussian" sphere which has a point charge (-3 microcoloumbs) enclosed with the radius of 0.2 m ... I can shortcut this and use Flux= q Enclosed / e0.. However, i want the other approach using the formula Flux = ∫ E da... I know that E is constant at the surface but shouldn't we be adding them to get amuch larger E... I mean E is constant in magnitude for every point on the sphere. Shouldn't we add them up. A much general rule to discuss is that why do we sometime need double integration in such formulas. I mean consider a cube. Even if E is changing, it will be constant at any face...