DC circuitsQuestion 643 of 1506

Two parallel branches have conductances of 0.2 S and 0.3 S. What is the total resistance of the pair?

  1. 0.5 Ω
  2. 5 Ω
  3. 2 Ω
  4. 0.1 Ω
Show answer

Correct answer: 2 Ω

Total conductance is 0.2 + 0.3 = 0.5 S. Total resistance is 1 / 0.5 S = 2 Ω.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 5.4: Conductance

Practice dc circuits

Questions last reviewed: 18 October 2026