# How to plot this equation in Mathematica

• Nov 27th 2011, 07:45 AM
roshanhero
How to plot this equation in Mathematica
The potential inside of a uniformly charged sphere of radius R is given by $\frac{Q}{4\pi \epsilon _{0}}\frac{1}{2R}(3-\frac{r^2}{R^2})$
I would choose units for charge so that numerically $Q=4\pi \epsilon_0$
and we choose the radius of the sphere to be $R=1$.