Capacitor charging graph

[CR Haeger]

(11-25-2014 07:23 AM)Alan72 Wrote:  I'm trying to plot an exponential graph to show what happens when a capacitor is charged in a series resistor capacitor circuit.

I can do it on paper but would like to show it on my Prime. Can anyone help?

The formula I'm using on paper is Vc=Vs(1-e^(-t/RC)). This is documented throughout the Internet.

I'm trying to produce the curved graph produced as the capacitor charges and as a new user to graphing calls, am unsure of where to start. Can anyone give me a friendly nudge?

If all you are interested in doing is creating a graph based on values of Vs, R, C and t (x), then I think you have two options:

1. In Home, store values for Vs, R and C using say 1 Sto>Vs etc... This creates user variable for Vs, while R and C are existing Home/Real variables.

or

2. In CAS**, store value for Vs, Vs:=1 , which creates a CAS variable. If you want R and C to be CAS variables as well, edit the names, like R1, C1 and use := .

Then, in Function app, enter the function Vs*(1-e^(-X/R*C)) into F1: . This should yield the plot. Editing the variables Vs, R and/or C should adjust the plot.

** If you wanted to work symbolically with the formula for Vc, then setting up the variables and perhaps the Vc formula in CAS is helpful.

There are other ways to do this.