Correct answer: 1 volt
Explanation:
By definition, electric potential (voltage) is the work done per unit charge to move a charge between two points. Mathematically, \[ \text{Voltage (V)} = \frac{\text{Work (Joule)}}{\text{Charge (Coulomb)}} \] So, \[ 1 \ \text{volt} = \frac{1 \ \text{joule}}{1 \ \text{coulomb}} \]
Hence, the correct answer is: 1 volt.
The ratio of the currents i$_1$, i$_2$ and i$_3$ in the circuit is: