The product of conductivity and resistivity of a conductor, often referred to as the conductance, depends on the material characteristics of the conductor. The conductivity is a measure of how well a material can conduct electric current, while the resistivity is a measure of the material`s inherent resistance to the flow of current.

Option 1 suggests that the product depends on the pressure applied to the conductor. However, the conductance of a conductor is not affected by the pressure applied to it. Pressure primarily affects the physical dimensions of the conductor, such as its length or cross-sectional area.

Option 2 suggests that the product depends on the current flowing through the conductor. While the current flowing through a conductor affects the overall conductance, it does not directly influence the product of conductivity and resistivity. The product is a characteristic property of the material itself and is independent of the current flowing through the conductor.

Option 3 states that the product is the same for all conductors, which is the correct answer. The product of conductivity and resistivity, or conductance, is a fundamental property of the material itself and does not change from one conductor to another. This property allows us to compare the electricity-conducting capabilities of different materials.

Option 4 suggests that the product varies from conductor