Final answer:
In a physics context dealing with electric circuits, the voltages across separate voltage sources like batteries add up in a series circuit, reflecting the conservation of energy in the system.
Step-by-step explanation:
The question pertains to a physics concept involving electric circuits and the behavior of voltages across circuit components. When a circuit consists of batteries and resistors, the voltage of the batteries must add up correctly to comply with the conservation of energy. Similarly, as you move around a closed loop in a circuit, the sum of the voltages around the loop must equal zero. This ensures that the total electrical energy input by the batteries is equal to the total energy dissipated by the resistors. In a circuit with multiple batteries connected in series, the voltages simply add together to yield the total voltage supplied by the circuit. This is because in a series circuit, the current is the same throughout and thus the voltage supplied is the sum of the individual voltages across the circuit elements (V = V₁ + V₂ + V3).