What is the total voltage between the ends of a section of a circuit containing conductors connected in series?

The total voltage between the ends of the circuit section in which the conductors are connected in series is equal to the sum of the voltages on each conductor:
U = U1 + U2 + U3 + … + Un, where n is the number of conductors.
Ohm’s law:
I = U / R, hence:
U = I * R, where I is the current in the circuit in which the conductors are connected, R is the total resistance of the conductors in the circuit.
Total resistance of series connected conductors:
R = R1 + R2 + R3 + … + Rn
Voltages on each conductor:
U1 = I * R1
U2 = I * R2
Un = I * Rn
Using these expressions, you can determine the total voltage between the ends of a section of the circuit.