Consider two copper wires. One has twice the cross-sectional area of the other. How do the resistances of these two wires compare?

Question

Quizplus · Accepted Answer

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Since the two wires are made of the same material and have the same length, the wire with the larger cross-sectional area will have the lower resistance. Specifically, the resistance of the thicker wire will be half that of the thinner wire.

Consider Two Copper Wires