For a point charge Q,
Electric potential is inversely proportional to r and Electric field is inversely proportional to r2.
Electric Potential
\(V = \frac{Q}{4 \pi \varepsilon_o r}; i.e., V \propto \frac{1}{r}\)
Electric field
\(E = \frac{Q}{4 \pi \varepsilon_o r^2}; i.e., E \propto \frac{1}{r^2}\)
The graph below shows us the variation of E and V with distance ‘r’.