Question Detail
Question
Copper coil resistance 200Ω at 0°C. Resistance at 80°C? α=0.004041 °C⁻¹.
Correct Answer
Option A is the correct answer.
Detailed Explanation
R = R₀(1 + αΔT) = 200(1 + 0.004041×80) = 200(1 + 0.32328) = 200×1.32328 = 264.656 Ω ≈ 264.65 Ω.
Hint
R = R₀(1 + αΔT).