A) \[\text{9}\times \text{l}{{0}^{\text{5}}}\]
B) \[\text{5}\times \text{l}{{0}^{\text{9}}}\]
C) \[\text{2}.\text{25}\times \text{1}{{0}^{11}}\]
D) \[\text{3}\times \text{l}{{0}^{\text{19}}}\]
Correct Answer: B
Solution :
\[{{n}_{e}}{{n}_{h}}={{({{n}_{i}})}^{2}}\] \[{{n}_{e}}\times 4.5\times {{10}^{22}}={{(1.5\times {{10}^{16}})}^{2}}\] \[{{n}_{e}}=\frac{2.25\times {{10}^{32}}}{4.5\times {{10}^{22}}}\] \[{{n}_{e}}=5\times {{10}^{9}}\]You need to login to perform this action.
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