there's no reason really as to why the superconductivity
principle can practically make a dc-motor running as perpetual
except during starting only (which needs input first). Perpetual
in a sense that it can run indefinitely without requiring input
current always as it becomes self-sustaining and able to run
with ease even with loads. but there are sceptics and nay-sayer
or other savants and researchers who still say it is not
possible ? Why, what's the reason ? in my view, the resistance
per se is actually (unit of which is the ohm) in fact the
physical reaction of the material from the passage of the
electrons (which constitutes current) per second flowing through
the entire lenght of the conductive material which is
proportionate to it's longitudinal dimension and inveresely to
it's cross section and once this wire becomes superconductive,
therefore no resistance at all, then the current flows
indefinitely (ad infinitum) without losses. Then if that's the
case, what remains is the inductance of the wire on