> >A related 'trick' question: take a wire cube, each wire has a > >resistance of 1 ohm. Put a 1 Volt battery on the two diagonally > >opposite points on one side. How much current does the > battery supply? > >The trick is of course that some wires carry zero current. > > I beg to differ. There are no wires that bear zero current in > a cube as you describe (hint: the number of edges the current > has to traverse is always uneven - equal to three). I guess you put the battery between 0,0,0, and 1,1,1. I tried (in words) to specify a battery between 0,0,0 and 1,1,0. This might have confused you? Wouter -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics