Question

The energy of an electron in excited hydrogen atom is –3.4 eV. Then according to Bohr's theory the angular momentum of the electron in J-s is –

• A. 2.11 × 10^–34
• B. 3 × 10^–34
• C. 2 × 10^–34
• D. 0.5 × 10^–34

Answer 1

Answer: (A)

2.11 × 10^–34

Answer 2

n = 2 Ž J₂ = $\frac{2h}{2\pi}$ = $\frac{h}{\pi}$ = $\frac{6.62 \times 10^{- 34}}{3.14}$

= 2.11 × 10^–34 J-sec