In a series circuit with three resistors, how is the total resistance found?

In a series circuit, the components are connected end to end in a single path, so the total resistance is simply the sum of the individual resistances: R_total = R1 + R2 + R3. The same current flows through every component in series, while the voltage divides among them. This contrasts with a parallel circuit, where total resistance is found with a reciprocal formula and is always less than the smallest individual resistor. Recognizing series (add resistances, one path) versus parallel (multiple paths, lower total resistance) is essential circuit knowledge.