Electric Field (9th Day)

Spring 2015
Professor Mason
March 24 Class

Definition of Electrical Field

 The first thing we learned in class was to define Electrical Fields. The picture attached shows the four definition of electrical fields along with the equation, which is [E = kq/r^2].
There are four steps to help remember the calculation/equation of electrical fields, which is shown in the picture attached below.

 Force on charged particle in an electric field, [F = qE].

Electric Field has field lines; field lines point out of positive charges and into negative charges (infinite lines on the charge). It uses the lines on charge to calculate the magnitude.






Super Position Principle
Super Position Principle is the complicated version of defining waves, which means that two waves that added together, and it works in electric fields (vector sum of the forces), [E = E1 + E2].

In class, we did some calculations about this equation, and some of them requires Microsoft Excel in order to do the calculation to make them easier to calculate. We used [r hat = vector r2 - vector r1 divided by magnitude of r2-r1 that will equal to just r], so it becomes [E = kq(vector r2 - vector r1)/ r^3]. The picture attached below is the calculation we did on Microsoft Excel.

VPython

In class, we were given a code from the lab book or we could also find it on profmason.com, and we needed to draw the diagram based on the code. The picture attached shows the diagram we made based on reading the given code.