a/ \(n=\frac{I.t}{\left|e\right|}\Leftrightarrow1,5.10^8=\frac{3I}{1,6.10^{-19}}\Rightarrow I=...\left(A\right)\)
b/ \(n=\frac{I.t}{\left|e\right|}=\frac{\frac{1,5.10^8.1,6.10^{-19}}{3}.2.60}{1,6.10^{-19}}=...\)
c/ \(I=\frac{\Delta q}{\Delta t}\Rightarrow t=\frac{2}{\frac{1,5.10^8.1,6.10^{-19}}{3}}=...\left(s\right)\)