Final answer:
The potential differences can be calculated using the formula ΔV = V2 - V1, where V2 is the voltage at the second point and V1 is the voltage at the first point. Since we are dealing with a battery, the potential difference between the positive and negative terminals is equal to the voltage of the battery.
Step-by-step explanation:
The potential differences can be calculated using the formula ΔV = V2 - V1, where V2 is the voltage at the second point and V1 is the voltage at the first point.
So, ΔV12 = V2 - V1, ΔV23 = V3 - V2, ΔV34 = V4 - V3, and ΔV41 = V1 - V4.
Since we are dealing with a battery, the potential difference between the positive and negative terminals is equal to the voltage of the battery. So, we can substitute V3 with the voltage of the battery in the calculations.