PHY 2020 Lecture 29: Lecture 29
Document Summary
We can identify ecos as the component of the vector e perpendicular to the area. If we call this component e, then the above equation can be written. The total electric flux through a closed surface is equal to the total (net) charge inside the surface (called gaussian surface: f. Another way of finding the electric field in a region of space! The flux can be independently determined by dividing the surface up into small elements of area a and then performing the sum. Positive charge inside box, electric field lines go outward. Negative charge inside box, electric field lines go inward. The net flux is zero if there is no charge or zero net charge inside box, regardless if there is electric field or not. Example: a pair of equal and opposite point charges with magnitude 5. What is the electric flux through a spherical surface which is enclosing the two point charges.
