A) \[3.15\times {{10}^{-34}}\,J-\sec \]
B) \[1.82\times {{10}^{-34}}\,J-\sec \]
C) \[5.01\times {{10}^{-30}}\,J-\sec \]
D) \[7.14\times {{10}^{-31}}\,J-\sec \]
Correct Answer: A
Solution :
\[\begin{align} & \left( {{n}^{2}}=\frac{13.6}{1.5}\Rightarrow {{n}^{2}}=9 \right) \\ & \therefore n=3 \\ & \text{for}\,\text{1}\text{.5}\,\text{eV,}\,\text{n=3} \\ \end{align}\] Angular momentum \[=n\frac{h}{\pi }\] \[=\frac{3\times 6.6\times {{10}^{10-34}}}{2\times 3.14}=3.15\times {{10}^{-34}}\,\text{J-sec}\]
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