Question

The orbital velocity of electron in the ground state is v. If the electron is excited to energy state – 0.54 eV, its orbital velocity will be-

• A. v
• B. $\frac{v}{3}$
• C. $\frac{v}{5}$
• D. $\frac{v}{7}$

Answer 1

Answer: (C)

$\frac{v}{5}$

Answer 2

E_n = – $\frac{13.6}{n^{2}}$ or n² = – $\frac{13.6}{–0.54}$

or n² = 25.2 or n = 5 (nearly ) \ v_n = $\frac{v}{5}$