Question

According to Bohr’s theory, the angular momentum to an electron in 5th orbit is :

• A. 25 $\frac{h}{\pi}$
• B. 1.0 $\frac{h}{\pi}$
• C. 10$\frac{h}{\pi}$
• D. 2.5$\frac{h}{\pi}$

Answer 1

Answer: (D)

2.5$\frac{h}{\pi}$

Answer 2

Angular momentum of the electron, mvr $= \frac{nh}{2\pi}$ where n = 5 (given)

\ Angular momentum $= \frac{5h}{2\pi} = 2.5\frac{h}{\pi}$