Q. According to Bohr’s theory, the angular momentum of an electron in 5th orbit is
A) $25\frac{h}{\pi}$
B) $1.0\frac{h}{\pi}$
C) $10\frac{h}{\pi}$
D) $2.5\frac{h}{\pi}$
Explanation
(d)
Angular momentum of an electron
$= mvr = \frac{nh}{2\pi}(n\ is\ orbit\ number)$
$in\ 5th\ orbit = \frac{5h}{2\pi} = \frac{2.5h}{\pi}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.