Which factor does NOT affect the resistance of a conductor?

The resistance of a conductor is determined by several factors, including the material from which the conductor is made, its length, and its cross-sectional area. Each of these plays a critical role in establishing how much resistance the conductor will provide to the flow of electric current.

The material influences resistance because different substances have varying numbers of free electrons. For example, copper has a lower resistance compared to rubber due to its high conductivity. Similarly, the length of the conductor directly impacts resistance; the longer the conductor, the greater the resistance because electrons encounter more obstacles over the increased distance. Lastly, the cross-sectional area also affects resistance; a conductor with a larger cross-sectional area will have less resistance, as there is more space for electrons to flow.

Color, however, does not intrinsically affect the electrical resistance of a conductor. While color may indicate some properties (for instance, in wires where color coding is used for identification), it does not have a physical impact on the resistance. Therefore, it is correct to conclude that color is the factor that does not affect the resistance of a conductor.