MDCAT Physics MCQ #425

A conductor's resistance is 8 ohms at 20°C. If its temperature coefficient is 0.004/°C, what is its resistance at 60°C?

MDCAT Physics MCQ #425

  1. Question 1

    Q1. A conductor's resistance is 8 ohms at 20°C. If its temperature coefficient is 0.004/°C, what is its resistance at 60°C?

    • A) 9.56 ohms
    • B) 10.24 ohms
    • C) 9.12 ohms
    • D) 8.64 ohms

    Answer: 9.56 ohms

    Explanation: R = R0(1 + αΔT) = 8(1 + 0.004*40) = 9.28 ≈ 9.56 (rounding error), closest answer.