I already did a similar question here but got very little response so I will try to reformulate my question into a better one. So, the basic idea of the original question was whether a Faraday disc aka homopolar generator be made such as to have no sliding contacts and the load being attached to the rotating disc if the correct rules are satisfied, chief among which is to have the B field at the correct angles at every part of the current generating part of the circuit in order to avoid inducing currents that run counter to the main current. Theoretically a conductor rotating in a homogeneous B field should get a charge imbalance formed on the conductor due to the Lorentz force acting on the "free" charge inside the conductor, much like the plates of a capacitor get charge imbalance due to the work of the E field. the question is can this charge imbalance be made to run as a current in a loop if every part of the loop is rotating together with the parts that are subjected to the homogeneous B field. For simplicity lets imagine a simple circular or rectangular wire loop which is surrounded by a B field such that the field lines point from center of the loop to outside at every part of the loop (by the way this is mechanically possible to make in reality), would this loop then have current if it was moving through space? because from the reference point of the loop the field lines are static and not changing and also from the lab reference point the field lines are static, in other words I want to confirm what i already suspect that the reason a homopolar generator/motor can work is that it has a fixed current point at some place on the disc and so the complete loop (both the rotating part and stationary part) is cutting field lines but with a loop in which all parts of the loop are in the same reference frame no extra field lines can be cut in a static homogeneous B field so no current can be generated? so in a way we could say the Faraday disc still obeys induction laws as ordinary generators simply in a bit different manner. In other words the only reason why a Faraday disc can output steady DC and other generators cannot is because if we imagine the current loop, the part which covers the disc surface is sort of dragged over static field lines forming a loop which in theory is constantly expanding? anyway I hope I made myself as clear as possible because this is really confusing for me because from one point according to Lorentz law there should be current even without slip contacts from the other point I know of no devices which would have worked or have been made without slip contacts in this fashion so where is the catch?