An arrangement of resistors, each having resistance $1\,\Omega$, is joined as illustrated. The current in the resistor at the far end is $1\,\text{A}$. What is the potential difference (p.d.) $V$ between the input terminals?
- A$2\,\text{V}$
- B$5\,\text{V}$
- C$8\,\text{V}$
- D$13\,\text{V}$