what would decrease the resistance of wires carrying an electric current?\no shorter wires\no higher…

Explanation:

Step1: Recall resistance formula

The resistance $R$ of a wire is given by the formula $R = \rho\frac{l}{A}$, where $\rho$ is the resistivity of the material, $l$ is the length of the wire, and $A$ is the cross - sectional area.

Step2: Analyze each option

• Shorter wires: From the formula $R = \rho\frac{l}{A}$, when $l$ (length) decreases, with $\rho$ and $A$ constant, $R$ decreases.
• Higher - temperature wires: For most materials, resistivity $\rho$ increases with temperature, so higher - temperature wires would increase resistance.
• Darker - colored wires: Color of the wire has no relation to its resistance.
• Thinner wires: Thinner wires mean smaller cross - sectional area $A$. From $R=\rho\frac{l}{A}$, when $A$ decreases with $\rho$ and $l$ constant, $R$ increases.

Answer:

shorter wires