Final answer:
The question is about finding charge density distributions on conductive surfaces in a uniform potential field along the z-axis, but lacks sufficient information for a specific solution.
Step-by-step explanation:
The question appears to relate to the topic of electric fields and charge distributions in various configurations. Specifically, it's about determining the charge density distribution on three conductive surfaces when a potential field is uniform along the z-axis. To answer this question, we would need the precise configurations of the conductive surfaces and any additional constraints or symmetries. For instance, if the surfaces are plates, spheres, or cylinders, and whether there are any externally applied electric fields or embedded charges within these conductors, which may not be specified in the question.
Charge density distributions are often found using electric field considerations and Gauss's law, a fundamental law that relates the electric field emanating from a surface to the charge enclosed by that surface. An understanding of electric potentials, field lines, and the geometry of the configuration is crucial to solve for charge densities.
It's important to have detailed information to solve for charge densities; otherwise, the solution may require assumptions leading to incomplete or incorrect answers, as the options given suggest ('Information insufficient').