Physics Unclassified 1 Mark
Appeared in: 2025 (2 sets)
The energy of an electron in a hydrogen atom in ground state is $-13.6\text{ eV}$. Its energy in an orbit corresponding to quantum number $n$ is $-0.544\text{ eV}$. The value of $n$ is (A) $2$ (B) $3$ (C) $4$ (D) $5$