The resistance of a wire depends on
A)the length of the wire.
B)the cross-sectional area of the wire.
C)the temperature of the wire.
D)All of the above.

Question

Quizplus · Accepted Answer

The resistance of a wire is determined by its length, cross-sectional area, and temperature. The longer the wire, the higher the resistance, as there is more material through which the current must flow. The smaller the cross-sectional area of the wire, the higher the resistance, as there is less room for current to flow. Finally, the resistance of a wire increases as its temperature increases, due to the increased movement of electrons within the wire. Therefore, all of the options (A, B, and C) affect the resistance of a wire.

The Resistance of a Wire Depends on