A) \[6.25\times {{10}^{18}}\]
B) \[1.6\times {{10}^{19}}\]
C) 100
D) \[6.25\times {{10}^{12}}\]
Correct Answer: A
Solution :
\[q=ne\] \[\therefore \] \[n=\frac{q}{e}=\frac{1}{1.6\times {{10}^{-19}}}=6.25\times {{10}^{18}}\]
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