A resistor with a resistance of $200\,\Omega$ is connected to a supply with a p.d. of $4.00\,\text{V}$. How many electrons move into the resistor in $4.00\,\text{s}$?
- A$3.13 \times 10^{16}$
- B$1.25 \times 10^{17}$
- C$5.00 \times 10^{17}$
- D$1.25 \times 10^{21}$