In: Physics
The two halves of the rod in the figure are uniformly charged to plus/minus Q as shown.
What is the electric potential at the point indicated by the dot?
Given that, the two halves of the rod in the figure are uniformly charged
to plus and minus charge. Since the rod is uniformly charged, the potental
due to first half of the rod is equal to the potential due to second half of the
rod, but both have opposite signs. So, the two potentials will cancel each
other. Hence, the electric potential at the point indicated by the dot is zero,
that is, \(V_{\text {ret }}=0\)