Static Fields 2023 (5 years)
Consider a collection of three charges arranged in a line along the
\(z\)-axis: charges \(+Q\) at \(z=\pm D\) and charge \(-2Q\) at \(z=0\).
Find the electrostatic potential at a point \(\vec{r}\) on the \(x\)-axis at a
distance \(x\) from the center of the quadrupole.
A series of charges arranged in this way is called a linear
quadrupole. Why?