engineering physics MCQ #989

The resistance of a wire is 5 ohm at 20°C and 6 ohm at 100°C. The temperature coefficient of resistance of the wire is?

engineering physics MCQ #989

  1. Question 1

    Q1. The resistance of a wire is 5 ohm at 20°C and 6 ohm at 100°C. The temperature coefficient of resistance of the wire is?

    • A) 0.0025 / K
    • B) 0.005 / K
    • C) 0.01 / K
    • D) 0.025 / K

    Answer: 0.005 / K

    Explanation: Using R = R0(1 + αΔT), we have 6 = 5(1 + α × 80), giving α = 0.005 / K.