Which option is NOT one of the factors affecting resistance?

Which option is NOT one of the factors affecting resistance?

• A. Material
• B. Temperature
• C. Length of conductor
• D. Color of insulation

Answer: (D)

The amount a conductor resists the flow of electric current depends on the material’s resistivity, the temperature, and its dimensions (length and cross-sectional area). The color of the insulation around the wire doesn’t affect the metal’s ability to conduct electrons, so it doesn’t change resistance. The resistance is given by R = ρL/A, where ρ is the material’s resistivity, L is length, and A is cross-sectional area. Longer wires have higher resistance, while thicker wires have lower resistance. Temperature also matters because, for most metals, higher temperatures increase resistivity, making resistance rise as the wire gets hotter. Since insulation color has no impact on these properties, it is not a factor in resistance.

The amount a conductor resists the flow of electric current depends on the material’s resistivity, the temperature, and its dimensions (length and cross-sectional area). The color of the insulation around the wire doesn’t affect the metal’s ability to conduct electrons, so it doesn’t change resistance. The resistance is given by R = ρL/A, where ρ is the material’s resistivity, L is length, and A is cross-sectional area. Longer wires have higher resistance, while thicker wires have lower resistance. Temperature also matters because, for most metals, higher temperatures increase resistivity, making resistance rise as the wire gets hotter. Since insulation color has no impact on these properties, it is not a factor in resistance.