MDCAT Physics MCQ #477

The resistance of a platinum wire at 0°C is 4 ohms. At 100°C, its resistance is 5 ohms. What is its temperature coefficient of resistance?

MDCAT Physics MCQ #477

  1. Question 1

    Q1. The resistance of a platinum wire at 0°C is 4 ohms. At 100°C, its resistance is 5 ohms. What is its temperature coefficient of resistance?

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

    Answer: 0.0025/K

    Explanation: α = (R - R0)/(R0*ΔT) = (5 - 4)/(4*100) = 0.0025/K.