Answer
$V=6.31\times 10^{-3} v$
Work Step by Step
Consider an infinitesimal segment of the rod, located between x and x +dx. It has length dx and contains charges $dq=λdx$ where $λ=\frac{Q}{L}$ is the linear charge density of the rod.Its distance from the $P_{1}$ is d+x and the potential it creates at $P_{1}$ is as follows:
