engineering physics MCQ #1874

The resistance of a germanium diode at 300 K changes from 100 Ω to 50 Ω when its temperature increases by 10 K. The bandgap energy is

engineering physics MCQ #1874

  1. Question 1

    Q1. The resistance of a germanium diode at 300 K changes from 100 Ω to 50 Ω when its temperature increases by 10 K. The bandgap energy is

    • A) 0.25 eV
    • B) 0.5 eV
    • C) 0.67 eV
    • D) 1 eV

    Answer: 0.67 eV

    Explanation: Using the formula for temperature dependence of resistance, Eg = k * ΔT / (ΔR / R), Eg = 0.67 eV.