What is the total resistance of figure "B" of the illustrated circuit if the resistance of R1 is 3 ohms, R2 is 4 ohms, and R3 is 5 ohms? Illustration EL-0020

Correct Answer: Option D — 12 ohms

Total resistance in a purely series circuit is the direct arithmetic sum of all individual resistances ($R_{total} = R_1 + R_2 + R_3$). Adding 3, 4, and 5 ohms yields 12 ohms total resistance, adhering to foundational principles outlined in IEEE 45.