engineering physics MCQ #492

The energy required to excite an electron from n = 2 to n = 4 is

engineering physics MCQ #492

  1. Question 1

    Q1. The energy required to excite an electron from n = 2 to n = 4 is

    • A) 2.55 eV
    • B) 1.89 eV
    • C) 1.36 eV
    • D) 0.85 eV

    Answer: 2.55 eV

    Explanation: Using the Bohr model energy formula: ΔE = 13.6 eV (1/n²_initial - 1/n²_final), ΔE = 13.6 (1/4 - 1/16) = 2.55 eV.