I have very poor understaning of electricity and usually go for "water analogy" (or Ohm's law) but it seem to have no use here:
I need to calculate a resistance of a metal disk with given diameter, thikness and conductivity but I'm also trying to understand what "actually" will go on?
Will current go in a thin channel of "least resistance"? Will it "go broadly" through all of the disk? My intuitiun tells me that it will matter what points of disk are actually in contact with the wires but why?
What is the "normal" way to calculate resistance of a complex body?