Hi, Personally I think that anyone that does not know ohm's law should not be messing with electricity and/or DIY. I wonder if they know which end of a soldering iron gets hot. It is simple...but then there are lots of folks that can't balance their checking accounts.
That's hilarious gofar; I remember ohm's law from my college Physics and back then it looked like an easy concept. Anyone dealing with matters electricity needs to understand it, really.