Wires X and Y are made of the same material. Which of the following could explain why wire X has a higher resistance than wire Y?
A)Wire X is colder than wire Y.
B)Wire X is shorter than wire Y.
C)Wire X has a different color coating than wire Y.
D)Wire X has a smaller cross-sectional area than wire Y

Question

Quizplus · Accepted Answer

The resistance of a wire depends on its material, length, and cross-sectional area. Since wires X and Y are made of the same material and the color coating does not affect electrical resistance, the only factor that could explain a higher resistance in wire X is a smaller cross-sectional area, as per D. Resistance increases with decreasing cross-sectional area.

Wires X and Y Are Made of the Same Material