Question

An electrons in 2nd orbit gains energy and goes to 5th orbit. What is the difference in angular momentums in joule sec experienced by the electron due to the transition?

• A. $3\times {10}^{-32}$
• B. $5.16\times {10}^{-34}$
• C. $6.62\times {10}^{-34}$
• D. $3.16\times {10}^{-34}$

Answer 1

Answer: (D)

$3.16\times {10}^{-34}$

Angular momentum = $\frac{\Delta nh}{2\pi }$ = $\frac{3\times 6.6\times {10}^{-34}}{2\times 3.14}=3.16\times {10}^{-34}$