Heavy Duty Technician Complete Practice Exam 2026

The statement that longer wires have less resistance is indeed false. Generally, the resistance of a conductor is directly proportional to its length. This means that as the length of a wire increases, its resistance also increases. This relationship is governed by the fundamental principles of electrical conductivity, whereby longer paths for electrons to travel lead to more opportunities for collisions with atoms in the material, thus increasing resistance.

In essence, for a given material, if you double the length of the wire, you would expect the resistance to double as well, assuming the cross-sectional area and temperature remain constant. On the other hand, the type of material and its cross-sectional area can influence the overall resistance, but the length itself is a critical factor, contributing to an increase in resistance.

Option choices that suggest alternative conditions or variables do not negate the fundamental relationship between length and resistance, making the assertion that longer wires have less resistance unequivocally false. This is a foundational concept in understanding electrical circuits and the behavior of different materials under electrical load.