Which of the following factors affects the resistance of a conductor?

The resistance of a conductor is influenced by several physical attributes, which include the material from which the conductor is made, its length, and its cross-sectional area. Each of these factors plays a critical role in determining how easily electric current can flow through the conductor.

The material of the conductor affects resistance because different materials have varying levels of conductivity. For example, metals like copper and aluminum have low resistance due to their high conductivity, while materials like rubber or wood have high resistance.

Length is also a significant factor; as the length of the conductor increases, its resistance increases. This is because electrons have to travel a longer distance, which increases the chances of collisions and energy loss, thus causing greater resistance.

The cross-sectional area of the conductor is inversely related to resistance. A larger cross-sectional area allows more electrons to flow simultaneously, decreasing resistance. Conversely, a thinner conductor will have higher resistance due to the limited space for electrons to pass through, leading to more frequent collisions among them.

Considering these aspects, the combination of the material, length, and cross-sectional area clearly outlines why option B is the correct response regarding the factors affecting the resistance of a conductor. Other options, such as electrical cost and voltage, while related to electrical systems, do not