Write an equation for the electric potential due to a linear charge distribution.

(N/A) The electric potential $V$ at a point $P$ due to a continuous linear charge distribution with linear charge density $\lambda$ along a line element $dl$ is given by the integral:
$V = \frac{1}{4\pi\epsilon_0} \int \frac{\lambda dl}{r}$
where:
$1. \epsilon_0$ is the permittivity of free space.
$2. \lambda$ is the linear charge density (charge per unit length).
$3. dl$ is the infinitesimal length element of the distribution.
$4. r$ is the distance from the charge element $dl$ to the point $P$ where the potential is being calculated.