The total of all voltages surrounding a closed-loop in any circuit must equal zero, according to this Kirchoff's second law.
This is another result of charge saving as well as energy conservation.
This rule governs voltage decrease at various branches of an electrical circuit.
Consider one point on a closed loop in an electrical circuit. If someone proceeds to another point in a comparable ring, they will discover that the potential at a certain second position may not be identical to the previous.
Mathematically, the total voltage in a closed loop of a circuit is expressed as