Question

According to Bohr's theory, the angular momentum of an electron in the $4^{th}$ orbit is:

• A. $\frac{h}{2\pi }$
• B. $\frac{2h}{\pi }$
• C. $\frac{3h}{2\pi }$
• D. $\frac{3h}{\pi }$

Answer 1

Answer: (B)

$L=\frac{nh}{2\pi }$

$n=4$

$\therefore L=\frac{4h}{2\pi }=\frac{2h}{\pi }$