What is the effect of increasing the diameter of a conductor on its resistance?

Increasing the diameter of a conductor has a direct impact on its resistance, resulting in a decrease in resistance. This phenomenon can be understood through the principles of electrical conductivity.

Resistance is inversely related to the cross-sectional area of the conductor. When the diameter of a conductor increases, its cross-sectional area also increases. This expanded area allows more pathways for electrical current to flow through the conductor, thereby reducing resistance to the flow of electricity.

Ohm's law, which states that resistance (R) is equal to resistivity (ρ) multiplied by the length (L) of the conductor divided by its cross-sectional area (A), is instrumental in understanding this relationship. As the area increases, if the material and length remain unchanged, the overall resistance decreases.

Therefore, the correct answer is that resistance decreases as the diameter of the conductor increases.