The fast answer is, deauss the set. Since you probably don't have a degaussing coil, you can use a hand-held soldering iron to produce a varying magnetic field. Turn on your soldering iron at a distance of about three feet from the TV screen, and then move it in close to the screen. You will...
In a DC circuit, Ohm's law will give you the voltage drop. It is Voltage = Current times Resistance. This is usually seen written as E=IR, where E is the voltage. You say you have access to the specs for the wire, so all you have to do is calculate the resistance for the length in question...
