A) \[3.62\times {{10}^{4}}/\sec \]
B) \[0.362\times {{10}^{4}}/\sec \]
C) \[362\times {{10}^{4}}/\sec \]
D) \[36.2\times {{10}^{4}}/\sec \]
Correct Answer: A
Solution :
\[1C\]= Activity of \[1g\] of \[R{{a}^{226}}=3.7\times {{10}^{10}}dps\] Activity of \[1\mu g\] of \[R{{a}^{226}}=3.7\times {{10}^{4}}dps\] So, the no. of \[\alpha \]-particles are emitted per second by \[1\mu g\] of \[Ra\] is \[3.7\times {{10}^{4}}dps\,\approx 3.62\times {{10}^{4}}/\sec \]
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