The diagram shows a junction in an electrical circuit. Three wires meet at this junction, with the currents in two of the branches indicated by the arrows.
How many electrons pass a given point in the wire carrying current I3 I_3\,I3 during a time interval of 8.0 s?
The elementary charge e=1.60×10−19 Ce = 1.60 \times 10^{-19}\text{ C}e=1.60×10−19 C.
3.0×10193.0 \times 10^{19}3.0×1019
1.2×10201.2 \times 10^{20}1.2×1020
3.8×10183.8 \times 10^{18}3.8×1018
7.3×10197.3 \times 10^{19}7.3×1019