The current in a metallic conductor is 3.2 mA.
How many electrons pass a point in the conductor in five minutes? (The elementary charge e=1.6×10−19 Ce = 1.6 \times 10^{-19}\text{ C}e=1.6×10−19 C)
1.0×10171.0 \times 10^{17}1.0×1017
6.0×10186.0 \times 10^{18}6.0×1018
9.6×10199.6 \times 10^{19}9.6×1019
6.0×10216.0 \times 10^{21}6.0×1021