What is the resistance of a power cord?

It depends on the size of the cord and the volts it carries-

But to find how much VOLTAGE a wire consumes...

It could be found by V = I X R

Usually the resistance of electrical wires is not TOO important- its important when you try to force large amounts of current through a long piece of wire. So lets say a wire is very long and was connected to a battery that had 15 volts and the resistance of the thin wire is 0.2, V=15 x 0.2 = 3 volts. Three volts is not a big deal if you have a high voltage power supply, but if you are using say a 12 volt car battery the length of the wire would take one quarter of the available voltage-which is why a automotive batteries cable is thick -to reduce its resistance below 0.2Ohms.

This is still sort of an in-direct answer- but it might help.