engineering physics MCQ #391

The energy of the nth orbit of hydrogen atom is given by En = -13.6 / n² eV. What is the energy of the 3rd orbit?

engineering physics MCQ #391

  1. Question 1

    Q1. The energy of the nth orbit of hydrogen atom is given by En = -13.6 / n² eV. What is the energy of the 3rd orbit?

    • A) -1.51 eV
    • B) -3.4 eV
    • C) -6.04 eV
    • D) -12.09 eV

    Answer: -1.51 eV

    Explanation: Substitute n = 3 in the given formula: En = -13.6 / 3² = -13.6 / 9 = -1.51 eV.