WAEC Physics 2021 Paper

Concept:The resistance of a wire depends on the material, length, and cross-sectional area, but not on its mass.Explanation:The resistance $R$ of a wire is given by $R = \rho \frac{L}{A}$.Here, $\rho$ is the resistivity of the material, $L$ is the length, and $A$ is the cross-sectional area.So, the factors that determine resistance are the material, length, and cross-sectional area.Mass does not appear in this formula, so it is not a determining factor.Answer:A. mass