How to plot it graph in Mathematica

1. Nov 27, 2011

roshan2004

The potential inside of a uniformly charged sphere of radius R is given by $\frac{Q}{4\pi \epsilon _{0}}\frac{1}{2R}(3-\frac{r^2}{R^2})$.
Please help me on how to plot this equation in Mathematica

2. Nov 27, 2011

JHamm

3. Nov 27, 2011

roshan2004

Thanks for the help, but it shows error.

4. Nov 27, 2011

nasu

You cannot plot it as a general formula. You need to assign values to the parameters (Q, epsilon_o, R) so you will have a function of one variable only (r).

5. Nov 27, 2011

JHamm

Oops my bad, sorry :)