what happens when you put too much current through? Does the notebook go up in flames? Having seen many fellow classmates flip polarities to watch caps explode, i can see them lighting up their notebooks with this..
Hooking up 230 V to a 2 cm @ 100ohm/cm resistance trace would generate about 250W of heat (unless I'm miscalculating something), which is about the power rating of a beefy soldering iron, or an amnemic hair drier, and at that lenght, it should be enough to ignite the paper. However you have to consider that