A) \[3\times {{10}^{19}}\]
B) \[7.68\times {{10}^{21}}\]
C) \[7.68\times {{10}^{20}}\]
D) \[3\times {{10}^{20}}\]
Correct Answer: A
Solution :
Number of electrons flowing per second \[\frac{n}{t}=\frac{i}{e}\]\[=4.8/1.6\times {{10}^{-19}}=3\times {{10}^{19}}\]
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