Question

As the electron in Bohr orbit of Hydrogen atom passes from state $n = 2$ to $n = 1$, the kinetic energy K and potential energy U change as.

• A. K two-fold, U four-fold
• B. K four-fold, U two-fold
• C. K four-fold, U also four-fold
• D. K two-fold, U also two-fold

Answer 1

Answer: (C)

K four-fold, U also four-fold

Answer 2

$U = 2E,$ $K = - E$ and $E = - \frac{13.6}{n^{2}} = eV$.