Write the equation for the electric field produced by a point charge. How does it depend on the distance from the charge?

(N/A) The electric field $E$ produced by a point charge $q$ at a distance $r$ from it is given by the equation: $E = \frac{1}{4\pi\epsilon_0} \frac{q}{r^2}$,where $\epsilon_0$ is the permittivity of free space.
Dependence on distance:
The electric field $E$ is inversely proportional to the square of the distance $r$ from the point charge,i.e.,$E \propto \frac{1}{r^2}$. This means that as the distance $r$ increases,the magnitude of the electric field decreases rapidly.