Question

The angular momentum of electron of hydrogen atom in ground energy state is:

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

Answer 1

The correct option is B $\frac{h}{2\pi }$

According to the Bohr's theory,

For ground energy state of electron $n=1$ ...(1)

Angular momentum is given by,

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

$L=\frac{h}{2\pi }$ ........from eq(1)