Question

According to second postulate of Bohr model, the angular momentum $\left( L_{n} \right)$ of n^th possible orbit of hydrogen atom is given by

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

Answer 1

Answer: (B)

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

Answer 2

Angular momentum

$L_{n} = mv_{n}r_{n} = \frac{nh}{2\pi} = nh$

Where h = planks constant

$r_{n} =$ Radius of nth orbit

$v_{n}$= Velocity of electron in nth orbit